Travis CI: Refactor travis script

To simplify modification/inclusion of continuous integration targets, this
removes travis.sh which contains a big if statement in favor of multiple scripts
under the new '.ci' directory.

.ci/api-python.sh

@@ -0,0 +1,19 @@
+. "$CI_SCRIPTS/common.sh"
+
+set_environment /opt/neovim-deps
+
+sudo apt-get install expect valgrind
+
+$MAKE_CMD
+
+git clone --depth=1 -b master git://github.com/neovim/python-client
+cd python-client
+sudo pip install .
+sudo pip install nose
+test_cmd="nosetests --verbosity=2"
+nvim_cmd="valgrind -q --track-origins=yes --leak-check=yes --suppressions=$suppressions --log-file=$tmpdir/valgrind-%p.log ../build/bin/nvim -u NONE"
+if ! ../scripts/run-api-tests.exp "$test_cmd" "$nvim_cmd"; then
+	valgrind_check "$tmpdir"
+	exit 1
+fi
+valgrind_check "$tmpdir"