Fix mini stats when expanded

Fixes #451
Rename section menu delete name

fixes #452
Rename 'notebook' and 'view' menu plugin files
Fix #462, rename 'notebook' and 'view' menu plugin files
Merge branch 'alee/fix-462' of https://github.com/twosigma/beaker-notebook into alee/fix-462
Merge pull request #463 from twosigma/alee/fix-462

Fix #462, rename 'notebook' and 'view' menu plugin files
Merge remote-tracking branch 'origin/master' into sjs/fix-mini-stats
Merge branch 'sjs/fix-mini-stats'
Merge pull request #461 from twosigma/sjs/452

Rename section menu delete name
add background, match colors from header
remove obsolete/duplicate readme
Merge pull request #464 from twosigma/spot/favicon

add background, match colors from header
Remove message logging for debug
Changed the impl of angularUtils.fcall so  take place properly
Merge pull request #477 from twosigma/alee/fix-minor

Change the implementation of angularUtils.fcall
fix angularUtils.fcall so it returns a then-able
Merge pull request #479 from twosigma/alee/fix-minor

fix angularUtils.fcall so it returns a then-able
Add header menu spacing for markdown cells

fixes #449
Handle input menu when collapsed
Fix #353, handle server disconnects on client(mainapp).

When server disconnects, there will be a dialog prompting the user
about server has disconnected and asking to save the notebook
as a file on the client side. If user chose not to, the dialog is
dismissed and beaker starts hijacking keypress events to prompt the
same dialog again on such events. The dialog can also be opened by
clicking on the red 'offline' label on the nav bar.