Adds GitLab CI config.

Squashed commit of the following:

commit d87230e5a2396530e93e9b20f312e08069c590ad
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 22:46:41 2016 +0200

    Fix tests on win

commit 25c90666fbde6c6c09352fba0cc7ed7ee2ce553c
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 22:27:00 2016 +0200

    Fix tests.

commit b46e00c86005d24fd210f8041031a4d7b6d73e3f
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 21:58:12 2016 +0200

    Fix deps probs.

commit 9c5db9eb9a41d8baab0124c28706ab2afb3c7f5f
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 21:14:14 2016 +0200

    Fixes yaml sytax

commit 292571a81b9b53b15b864aa2f86cb445f4e07307
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 21:13:06 2016 +0200

    Separates tests.

commit 3cc46c712b86bcab8fc79acf390487fe2061efa1
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 20:31:40 2016 +0200

    Fix batch script.

commit 6b93be904dd3064e2a651d012acf9978c33a4b43
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 20:22:24 2016 +0200

    Windows fixes?

commit 76dcda9d698682147025e7af5a563e2844c8ed84
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 20:16:35 2016 +0200

    Refactored ci yml file.

commit abd49689440e9159e6008f7ef12d3006f53d76fa
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 17:17:44 2016 +0200

    Add runner info to script.

commit 62d7c3fa6a0eb5a074aa8d2c151481973b305d12
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 17:11:29 2016 +0200

    Run on all runners.

commit d6132fdd7cd48d47f03baa8a2752323160a83f99
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 16:50:35 2016 +0200

    Remove tags.

commit 19fddf60fbec60586900702c36763c5b090cc88e
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 16:39:06 2016 +0200

    Added linux/windows.

commit f91745e2a35f079ddb71676783ef34504a1d6c43
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 16:24:02 2016 +0200

    More changes.

commit d5a4cc49adbb6741db3b9af6ccb7011916c2ebd3
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 15:55:21 2016 +0200

    More changes.

commit 12f59e529324af5c67520b6dd255f0082fa1dc37
Merge: c77244a 7aa6494
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 14:52:41 2016 +0200

    Merge branch 'devel' into gitlab-ci

commit c77244af513606b1245ebcb44ab68ca3108fd77b
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 14:48:25 2016 +0200

    More changes.

commit 4c56422f980fd16d251112b5d3ce696264b3170b
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 14:32:04 2016 +0200

    More change.

commit f709ea003f1649234a723ba9d8092edbde3ef6a9
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 14:17:58 2016 +0200

    Another try at CI.

commit ae79bb95bc639856f2637f93fc9a59b178a18b0f
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 14:03:58 2016 +0200

    Fixes .gitlab-ci.yml

commit 9b832dde4abb9e168d1c549e12ed20a8c5185d7b
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 14:00:48 2016 +0200

    Some changes to .gitlab-ci.yml.

commit c113a09b6f1dd1b87c1f34f2ea54364d701033e2
Author: Dominik Picheta <dominikpicheta@gmail.com>
Date:   Sun Aug 28 13:53:46 2016 +0200

    Adds .gitlab-ci.yml.

.gitlab-ci.yml

@@ -0,0 +1,83 @@
+# use the official gcc image, based on debian
+# can use versions as well, like gcc:5.2
+# see https://hub.docker.com/_/gcc/
+image: gcc
+
+stages:
+  - pre-build
+  - build
+  - test
+
+.linux_set_path: &linux_set_path_def
+  before_script:
+    - export PATH=$(pwd)/bin:$PATH
+  tags:
+    - linux
+
+.windows_set_path: &win_set_path_def
+  before_script:
+    - set PATH=%CD%\bin;%PATH%
+  tags:
+    - windows
+
+build-linux:
+  stage: build
+  script:
+    - sh ci/build.sh
+  artifacts:
+    paths:
+      - bin/nim
+      - bin/nimd
+      - compiler/nim
+      - koch
+    expire_in: 1 week
+  tags:
+    - linux
+
+build-windows:
+  stage: build
+  script:
+    - ci\build.bat
+  artifacts:
+    paths:
+      - bin\nim.exe
+      - bin\nimd.exe
+      - compiler\nim.exe
+      - koch.exe
+    expire_in: 1 week
+  tags:
+    - windows
+
+test-linux:
+  stage: test
+  <<: *linux_set_path_def
+  script:
+    - sh ci/deps.sh
+    - nim c --taintMode:on tests/testament/tester
+    - tests/testament/tester --pedantic all
+  tags:
+    - linux
+
+test-windows:
+  stage: test
+  <<: *win_set_path_def
+  script:
+    - call ci\deps.bat
+    - nim c --taintMode:on tests\testament\tester
+    - tests\testament\tester.exe --pedantic all
+  tags:
+    - windows
+
+.csources: &csources_definition
+  stage: test
+  script:
+    - nim -v
+    - ./koch csources
+    - ./koch xz
+  artifacts:
+    paths:
+      - csources
+
+csources-linux:
+  <<: *csources_definition
+  <<: *linux_set_path_def

ci/build.bat

@@ -0,0 +1,14 @@
+REM Some debug info
+echo "Running on %CI_RUNNER_ID% (%CI_RUNNER_DESCRIPTION%) with tags %CI_RUNNER_TAGS%."
+gcc -v
+
+git clone --depth 1 https://github.com/nim-lang/csources.git
+cd csources
+call build64.bat
+cd ..
+set PATH=%CD%\bin;%PATH%
+nim -v
+nim c koch
+koch.exe boot
+copy bin/nim bin/nimd
+koch.exe boot -d:release

ci/build.sh

@@ -0,0 +1,15 @@
+sh ci/deps.sh
+
+# Build from C sources.
+git clone --depth 1 https://github.com/nim-lang/csources.git
+cd csources
+sh build.sh
+cd ..
+# Add Nim to the PATH
+export PATH=$(pwd)/bin:$PATH
+# Bootstrap.
+nim -v
+nim c koch
+./koch boot
+cp bin/nim bin/nimd
+./koch boot -d:release

ci/deps.bat

@@ -0,0 +1,5 @@
+# Nimble deps
+nim e install_nimble.nims
+nim e tests/test_nimscript.nims
+nimble update
+nimble install -y zip opengl sdl1 jester niminst

ci/deps.sh

@@ -0,0 +1,19 @@
+# Some debug info
+echo "Running on $CI_RUNNER_ID ($CI_RUNNER_DESCRIPTION) with tags $CI_RUNNER_TAGS."
+gcc -v
+# Packages
+apt-get update -qq
+apt-get install -y -qq libcurl4-openssl-dev libsdl1.2-dev libgc-dev nodejs
+# FASM
+wget http://nim-lang.org/download/fasm-1.71.39.tgz
+tar xvf fasm-1.71.39.tgz
+# PATH handling
+export PATH=$(pwd)/fasm:$PATH
+which fasm
+export PATH=$(pwd)/bin:$PATH
+
+# Nimble deps
+nim e install_nimble.nims
+nim e tests/test_nimscript.nims
+nimble update
+nimble install zip opengl sdl1 jester niminst