gmod_src: Added URLBuilder helper class

Revision 567
Added URLBuilder helper class
Reports Lua errors to usChanged Files:
[ul]
[li]trunk/src_garrysmod/game/garrysmod_shared.vpc[/li][li]trunk/src_garrysmod/garrysmod/CLuaGameCallback.cpp[/li][li]trunk/src_garrysmod/garrysmod/CLuaGameCallback.h[/li][li]trunk/src_garrysmod/garrysmod/g_lua/CLuaInterface.cpp[/li][li]trunk/src_garrysmod/garrysmod/gmod_lua.cpp[/li][li]trunk/src_garrysmod/garrysmod/http-connection.cpp[/li][/ul]Added Files:
[ul]
[li]trunk/src_garrysmod/garrysmod/URLBuilder.cpp[/li][li]trunk/src_garrysmod/garrysmod/URLBuilder.h[/li][/ul]
Committed By Garry Newman