* Draw background over titlemap
* HIDEBACKGROUND to show titlemap
* Specify NOMUSIC or IGNOREMUSIC (to not change music)
* Linedef execs implemented for tree hierarchy, including bubbling (NOENTERBUBBLE/NOEXITBUBBLE)
* Specify ENTERWIPE and EXITWIPE
* Menuid hierarchy fixes (Control mapping, joystick setup)
* Time attack handling fixes
* Specify custom wipes on runtime for D_Display and P_SetupLevel (for titlemap)
* Allow for forcing and skipping a wipe
* Wipe utility functions F_GetWipeLength and F_WipeExists
* M_SkyScroll optimization with still speeds; refactor background drawing
* Music (in time attack screens so far)
* FadeStrength
* HideTitlePics
* Scrolling backgrounds in Time Attack (moved F_SkyScroll to m_menu)
* Clean up titlemapinaction so that it isn't true when you're playing
* Don't print "SPEEDING OFF TO [ZONE] [ACT 1]..." on screen if it's a titlemap - keep a nice and pretty black screen