* Revised S_PlayMusic arguments
* Now music plays again!

* Pause/ResumeSong remove handle argument
* LoadSong declare char *data argument
* Variable weirdness

This reverts commit 58fbb463.

# Conflicts:
#	src/android/i_sound.c
#	src/dummy/i_sound.c
#	src/win32/win_snd.c

This reverts commit b5c30958.

# Conflicts:
#	src/i_sound.h
#	src/s_sound.c
#	src/s_sound.h
#	src/sdl/mixer_sound.c

* Re-purpose I_LoadSong for digital music loading
* I_StartDigSong logic split between I_LoadSong and I_PlaySong
* Pause, Stop, and Unload routines are combined from Digi and MIDI
* music_lumpnum, music_data, music_handle from s_sound.c are gone

This reverts commit 8b46bce1.

* music_lumpnum, music_data, music_handle are gone
* Relevant interfaces I_PlaySong are transferred to I_StartDigSong

# Conflicts:
#	src/sdl12/i_cdmus.c
#	src/win32ce/win_cd.c

update XPM icon

See merge request !267

Change default sound volume

See merge request !238

Lua sector names fix

See merge request !263

SDL Mixer fixes

Closes #31

See merge request !260

Horizon line HOM fix

See merge request STJr/SRB2Internal!152

Fix white being treated as transparent.

See merge request !266

Polyobject sky plane crash fix

See merge request STJr/SRB2Internal!146

Leveltitle tinkering

See merge request STJr/SRB2Internal!134

# Conflicts:
#	src/hu_stuff.h

Woops! All trans

See merge request !265

NiGHTS: Handle sphere damage correctly upon timeout
* Spill spheres/chips, implement MT_FLINGBLUESPHERE and MT_FLINGNIGHTSCHIP
* Handle player->spheres and player->rings consistently

See merge request STJr/SRB2Internal!157

NiGHTS fix lap detection on inverted axis

See merge request STJr/SRB2Internal!138

Opting to handle this transparently via the Rings menu option. Doesn't seem worth making a separate entry for Spheres.

Hardcoding time again

See merge request STJr/SRB2Internal!130