Commented part of OpenReadOnlyTest
Because it would rightfully assert when trying to write on a read-only file.
String - Test Order
Updated the String test order to match the order in String.hpp and String.cpp
String -> Split - declaration
String - static

- Made a static version, rewrote and added some overloads for
- IndexOf
- LastIndexOf
- SubString

- Renamed the "val" parameter to "text"
Added "Assert(...);" to the Fail message.
Merge branch 'master' into StringSplit

Conflicts:
	Source/CoreLib/String/String.cpp
	Source/CoreLib/String/String.hpp
Fixed Win64 Build
String - Split

- Implementation of Split(TChar)
- Split(TChar) unit test