[KopiLua] Using targetFramework 4.5 to run tests.
Backport of 5.2.2 string library

Fixed StackOverflowException
[KopiLua] cherry-picked from Changed string.format to use the InvariantCulture (from @JCH2k) https://github.com/mlnlover11/KopiLua-v5.1.5/commit/9f068a4f505ea77d04dd443125817dc62a435350
Update mono package
[KopiLua] Use targetFramework=40 since travis doesn't support latest Mono.
Revert "Update mono package"

This reverts commit 6d4f236bdb59f22cb7f84207f44c066ee11ba3ba.
[KopiLua] Fixed StaticOperators test.
Update README.md
Update README.md
Fixed Debug functions to be compatible with KeraLua
Added LuaNetIsStringStrict
Disable CLS Compliance in Unity3D.
Forced consistent line endings.
Adding CLSCompliantAttribute to the project files.
Merge pull request #19 from Mervill/Unity3D

Unity3D compatibility (2).