Check for the existance of composer.selection

Don't assume that composer.selection has been set when focusing. This
may not be a "real" fix but it prevents thing from breaking.
Proxy key* events
Recompile.
Allow relative image urls in notes.
Removing 'Heya!' console.log message

It's tacky. Addresses issue #332
Fix iframe loading when embeded in Firefox sidebar

For some reason, the onload/onreadystatechange callbacks were not
getting called by Firefox when embeding the editor in a sidebar. This
fix may not be optimal but it works.
Rebuild.
Allow footers