Updated Common.h to use the Windows.h header.
Added left-hand-side operator+ for const char* for CString
CDictionary now has a GetKeyByIndex next to its brother GetValueByIndex.
Streams now implement BOOL AtEOF()
CMemoryStream now implements AtEOF too.
Added EOF check at CStream::ReadLine
Added Clear function to CDictionary and fixed a memory leak
Fixed a memory leak in CString::Split
Added network stream