WIP: Big GUI overhaul

- New in game window
- Lots of refined controls, such as edit box, list box, mouse cursor, ...
- Dropped suplicated controls in looknfeel
- Dropped a lot of old skin. The old skin left in use is only done for non-used control types yet.
- Added the game version in the main menu.
- Started making windows out of loading screens.
- Added the necessary controls to later add map description when clicking on the list.

All this is WIP but was already a lot of work. :D
Removed the line endings handling line for sln files in .gitattributes.

Fixes #40
Upgraded standard buttons - Skin part.
Upgraded standard buttons - look'n'feel part.
Upgraded the Editor loading menu.
Upgraded the Skirmish loading menu
Upgraded the multiplayer loading menu
Added new multiplyer client only layout

This will be used later when splitting joining/hosting a game...
Added new multiplayer server only menu

This will later be used when hosting a game...
Fixed control names linked with the source code.

The game is now functional again...
Added the version missing in the loading menus and fixed its location.
Split Joining and hosting game menus.

Also fixed the Tile API about traps.
Improved the creature stats window now the auto close button is working.
Upgraded the skirmish menu so that the map name and description is displayed in the GUI.
Used the map names and description in the server and editor lists.
Improved the text used to tell the currently selected room/trap/creature.
Precised a comment in .gitattributes
Merge pull request #160 from Bertram25/development

New GUI with better controls and menus