Build 0211

Release notes:

 - Make triggers positionable, add "Return" type trigger, and
   fix processing for "Special event" trigger type.
 - Add "Save to PNG" for composite maps.  Note that not all maps
   look exactly right yet.
 - Add fast forward toggle-button for music playback.
 - Fix alignment of song names and update some of the names.
 - Fix divide by zero exception for empty song channels.
 - Add placeholders for changing the total number of certain things.
 - Change method of output to project file and external files for
   composite maps.  Now stored as human-readable/modifiable properties
   file.  Old file type still supported for compatibility.  Similar
   changes to come for other data types.
 - Probably a bunch of other shit I forgot about it's been a while.

The big thing here is maps should be more easily editable due to positionable triggers.  This works in part due to a pile of new snescode I wrote to redesign the way they handle triggers, and it hasn't quite been tested to the extent it should be, so if anything seems horribly broken, do let me know.

https://dl.dropboxusercontent.com/u/19968993/som/FileListing.html

https://dl.dropboxusercontent.com/u/19968993/som/build%200211/somedit0211.rar

https://dl.dropboxusercontent.com/u/19968993/som/release_notes.txt