Remove debugging logs
Add language logos to plugin manager

Fixes #601
fix font size of table of contents
fix text tutorial: remove broken image, polish text.
add image loading and display to ipython tut.  also include most of the outputs.
initial release of output status restore

implemented framework for output status restore
implemented bko-plot output status restore
save/restore status for combined plots
implemented table state saving
use command as well as control

mac users will be happy
added comment
reorganized keyboard shortcuts

better support for windows and mac specific bindings
implemented undo/redo for delete notebook cells
Merge pull request #770 from twosigma/ildipo/issue-220

use command as well as control
Merge pull request #768 from twosigma/ildipo/displaystate

Ildipo/displaystate
remove debug logging
merge
cell body expansion

cell body is now saved (and read) as array of strings to support
diff-ing models
Merge branch 'master' into ildipo/jsonformat
do not copy default notebook
changed highlight for data tables