Move md-cell display logic to css
remove useless comment
Modify cells converter funcs to keep metadata through
Typo and presentation
Fix bug in bounded int/float logic.
remove cython extension.

Now in cython package itself, as stable.
remove Cython Built-in extension notebook
remove more ref to cythonmagic
use Cython.load_ipython_ext to simplify
add whatsnew and uppercase C in load_ext

Use uppercase as this is what is in cython docs.
avoid copious warnings in interact tests

comm was mocked out, but in a way that makes traitlets complain
Added test
update to warnings
Update path.py

change str formatting to repr representation.
register bare views
Merge pull request #6520 from minrk/comm-default

avoid copious warnings in interact tests
Use contentEditable to allow modification via the the slider readout
Add support to the float slider
Add keydown listener to commit changes on <enter>
Ignore the event object for handleTextChange