Fix "Version Date" in the title so it actually displays the date.

Also, we're not subtracting `1` from `(SDL_Rect **)`, but rather casting the int `-1`.
Don't update the `vidmodes` array when new vidmode == old vidmode
Video menu now only shows valid resolutions.

+ Noborder menu option in SDL2
Set videomode when exiting the video menu
Filter `disp->disp_name` in the menu.
Hide "Video Display:" option when there are < 2 displays.
Delete the I_Printf I used for debugging. (whoops)
Fix SDL2 fullscreen resize
Merge pull request #4 from dotfloat/master

Fix "Version Date" in the title so it actually displays the date.