playTheme fix for AudioPlayr
Fixed 'memory leak' in quadrants

Each quadColShift deleted one too few quadrants! Helps explain lower
performance in larger random maps.

Also improved AudioPlayer's documentation and removed one last erroneous
log message from it.
Added 3 missing Goombas in World 1-2
Placed CastleBlocks in PreCharacter collection instead of PreSolids to make them display properly
Merge pull request #115 from blamonet/missing-1.2-goombas

Added 3 missing Goombas in World 1-2
Followup to 1-2 missing Goombas
Merge pull request #116 from blamonet/fix-offscreen-castleblocks

Placed CastleBlocks in PreCharacter collection instead of PreSolids to make them display properly
Followup to fix offscreen castleblocks

Note that they'll spawn a little later than other solids.