* Update GLFW to 3.5.1
* Remove cocoa_time.c from rglfw.c
* Add macos_time.c to rglfw.c
* Redo changes from pull request #3863
* Makefile: add QuartzCore framework when building for macOS
* Add QuartzCore when building for macOS to other build files
* Remove unused GLFW dependencies
* FIXED: rexm's makefile and default paths
Fixed a windows only backslash in
rexm's makefile causing build errors on macOS and linux
Added unix paths to rexm for better compatibility
* Update rexm.c
Readded the fall-through in OP_CREATE
Added some safety checks to UpdateRequiredFiles() so it plays nicely outside of the raylib.com context (would segfault previously)