Puzzle help dialog animates from and away from the help button when opened and closed.

R=spertus@google.com

Review URL: https://codereview.appspot.com/11897043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1152 c400ca83-b69d-9dd7-9705-49c6b8615e23
Replaced TODO message descriptions in Code with real message descriptions.
Added tooltip to run button for Maze.
Because of competing CLs, this doesn't include the generated files.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/11654043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1153 c400ca83-b69d-9dd7-9705-49c6b8615e23
Removed svn:mime-type from json files with:
svn propdel svn:mime-type *.json
It had stopped "svn diff" from working (without the --force argument)
and messed up Rietveld interactions.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/11927044

git-svn-id: http://blockly.googlecode.com/svn/trunk@1154 c400ca83-b69d-9dd7-9705-49c6b8615e23