Disable online flag in register screen if user did not enable
internet in the dialog. Removed unused function.
Save 'remember-password' setting per user
Fixed logout of old player when switching to a new player. Fixed
disabling the account name (to prevent people from changing their
online name).
Added missing operator-(Vec3, btVector3). Without this operator
additional typecast where necessary on VS when computing
Vec3-btVector3.
Work on new feature unlocked cutscene, starting to work correctly, more testing (and art work) needed
Try to fix compilation with pre opengl 4 drivers.
Merge branch 'master' of github.com:supertuxkart/stk-code
Merge upstream/master into Flakebi/master