[engine]changing license to the zlib license

Conflicts:
	IndieLib/common/include/IND_TTF_Font.h
	IndieLib/common/include/IND_TTF_FontManager.h
	IndieLib/common/src/IND_TTF_Font.cpp
	IndieLib/common/src/IND_TTF_FontManager.cpp
	IndieLib/common/src/platform/win32/guicon.cpp
[engine]added new main license file
[engine]moved changelog up.
[other]added entries to .gitignore
[mac]Removes references in project to TODO, LICENSE and .md files
License change for test files
Merge remote-tracking branch 'origin/newlicense'