added a note about sharing of nbconvert tempates
Fixing various output related things:

This was inspired by PR #4105.

* JavaScript output no longer requires calling container.show()
* Added output_javascript CSS class that has zero height when
  empty.
* JavaScript error messages are properly indented with the prompt
  area.
check for libedit in readline on OS X

ensures readline is expressed as setuptools dependency on OS X if libedit is detected.
Merge pull request #4665 from minrk/readline-check

check for libedit in readline on OS X
Merge pull request #4646 from ellisonbg/output-js

Fixing various output related things:

JavaScript output no longer requires calling container.show()
Added output_javascript CSS class that has zero height when empty.
JavaScript error messages are properly indented with the prompt area.
Merge pull request #4650 from ivanov/templates-on-wiki

added a note about sharing of nbconvert tempates
Merge branch 'master' of ssh://github.com/ipython/ipython

* 'master' of ssh://github.com/ipython/ipython:
  check for libedit in readline on OS X
  Fixing various output related things:
  added a note about sharing of nbconvert tempates