Chat is not visible @game startup (also fixes a crash when pressing 't' while not ingame)

ScrollUp / ScrollDown functionality in chat (current 20 pages / 200lines)
Merge branch 'master' of https://github.com/IVMultiplayer/IVMultiplayer
Cleaned up CChat.cpp
Added Chatlog (Chatlog.txt)
Fixed Clientlog file recreation when writing into the Chatlog
Adjusted last commit to the style guidelines
Merge branch 'master' of https://github.com/IVMultiplayer/IVMultiplayer

Conflicts:
	Client/Core/CCore.cpp
	Client/Core/Graphics/CChat.cpp
Resolved conflicts, Small Cleanup in CCore::OnDeviceRender
Fixed previous commit
Merge pull request #9 from Rukenshia/master

CChat Additions
Chat is not visible @game startup (also fixes a crash when pressing 't' while not ingame)
ScrollUp / ScrollDown functionality in chat (current 20 pages / 200lines)
Some other stuff which is related with CChat