Several changes to split jump anims from spin anims:

* SPR2_JUMP and SPR2_SJMP are now the jump sprite sets for spin chars
* SPR2_SPNG and SPR2_SSPG are the new sprite sets for spring up anims (instead of JUMP/SJMP)
* S_PLAY_JUMP and S_PLAY_SUPER_JUMP are now the states for spin char jumps
* S_PLAY_SPRING and S_PLAY_SUPER_SPRING are the new states for spring up (instead of the "JUMP" states)
* PA_JUMP is now PA_SPRING (jumping anims are lumped with PA_ROLL)