Fix x64 warnings: Improvemеnts
UnicodeString.cpp: Try to fix AV
rdestl: typedef size_t size_type;
StringList::InsertItem
Classes.cpp: Use insert(Index, 1, Item) instead of insert(FList.begin() + Index, Item)

Hopefully fixes AV
(http://forum.farmanager.com/viewtopic.php?f=5&t=6317&p=107082#p107082)
Classes.hpp: Minor code style fix
version info: update
AbsolutePath: Minor fix