fixed a few annoyances and improved the source

WDD:
- added windows 8.1 support, fixed bugs and annoyances.
- The "skiponlinecheck" detection is now at the first line of the online
check, making the detection better.
- The shortcut creation at the first startup was axed, but you can
create a shorcut from the option menu.
- The key for exiting WDD from the download menu is now "B" instead of
"0". This should prevent an unwanted exiting.
- removed some unused jjump points
- added credit for my best friend Centzilius! :D

WDD INSTALLER:
- added an info that you must open the Installer.bat directly. This will
change later.

Life is boring without internet <.<