Remove Mac .DS_Store files

http://en.wikipedia.org/wiki/.DS_Store
Merge remote-tracking branch 'refs/remotes/upstream/master'
Initial pass at event manager. still incomplete.
Added fire method. Also attempted to improve comments and style.

Basing some style changes on the google javascript guidelines:
http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml
Merge remote-tracking branch 'refs/remotes/upstream/master'
fix missed rename of events_ field and syntax errors assigning methods
Create function comment for renderInteractive
1st pass at event manager test (and minimal button widget)

still need to figure out the API of a more complicated widget like Leslie's graph widget.
Merge remote-tracking branch 'refs/remotes/upstream/master'
Merge remote-tracking branch 'refs/remotes/upstream/master'
simple test of eventmanager seems to now work
Merge pull request #1 from mlippert/master

Work on event manager