Added "EndsWith" and "StartsWith" public static final methods in QString class.
Update/beautification of QString class.
Added Unit Tests for QString::EndsWith with and QString::StartsWith
Fixed the mistake of wrong positioning of assert statements.
Added the test case of needle in the middle.
Fixed spelling for function names.
Merge pull request #565 from vaibhav-kaushal/alpha-3.0

Added "EndsWith" and "StartsWith" public static final methods in QString.