all events refactored
tagsmenu and settings are now hidden with graph.

when graph is being redrawn (loading throbber appears) the tags menu
and the settings menu are also hidden to prevent multiple calls for
redrawing graph.
feedback button added
echonest logo added.
on hover echonest logo, change opacity
on hover change opacity -> feedback button
click node event not being binded. fixes #47
debug log removed
v1.0

- feedback button added
- echonest "powered by" logo added
- bugfix #47
v1.0

 - feedback button added
 - echonest "powered by" logo added
 - bugfix #47

Merge branch 'dev'