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.
fix python 3
Merge pull request #788 from twosigma/ildipo/pythonjson

fix python 3
merge
use new python syntax like beaker.x
remove the R evaluator
Merge pull request #789 from twosigma/spot/754

Spot/754
Merge pull request #791 from twosigma/spot/790

remove the R evaluator from a tut that does not use it
auto detect platform and show proper keys
Merge pull request #796 from twosigma/ildipo/keyshelp

auto detect platform and show proper keys
improve the d3 tut
Merge pull request #799 from twosigma/spot/d3

improve the d3 tut
improved python table display and fix full screen editor
Merge pull request #800 from twosigma/ildipo/pythontables

improved python table display and fix full screen editor
Fix Issue #165 by removing --pylab from our ipython command line.  Its functionality is replaced with some initCode, both matplotlib magic to get inline graphics, plus all the imports.  We should make the initCode (at least this the optional parts of it) a plugin setting so people can change it.  IPython does not recommend using all these imports: http://stackoverflow.com/questions/20525459/ipython-pylab-vs-ipython
Merge pull request #801 from twosigma/spot/165

Fix Issue #165 by removing --pylab from our ipython command line.  Its f...