Added top level convert class, updated init.py to load v#s
Notebook version conversions done right?
Fixes (iptest), simplified v1, v2, .. , vX import code
Relative import (suggested by @MinRK)
Revert b23f5b1525e76d5a
Relative import
Some small fixes and changes of nb version conversion
Small fix
Added nbformat ver conv tests, fixed some bugs
Added test nbs to setup and removed todo
Add an Audio display class

This is a first attempt at addressing issue 4241.
Fix unnecerary dependence to numpy
Move imports into methods and fix docstring typo
Fix talk about image embeding in the Audio class.

Too much copy paste I guess :)
Change to encodestring to b64encode to avoid newlines in the data URI

The point of this is to improve compatibility with older browsers.
also, encodestring is depricated in python 3.
Fix extra ) syntax error
Fix broken normalizing when signal array already has integer type

A case of unwanted integer division.
Speed up normalization if numpy is avaliable
Make it explicit that we don't support encoding stereo PCM signals
Remove support for encoding audio without numpy for performance