Merge branch 'release/v0.12.2'
Prepare the base for including js graphs

 * This huge commit addes the _page.html template
   with inclusion of the d3 and nvd3 static files
 * Remove some more references to pngs
 * Remove the pngs themselves from the tree
 * Remove all references to hard coded images
 * Add js css and page template
Replace automodule instructions with autoclass

All the classes are available from nvd3 directly,
so it make sense to treat them as classes rather then module.
That said, the modules containing the classes, are pointed from
the module index!
Replace hard coded js with cloudflare
Improve README.rst

Usage and teaser  before boring technical details
all classes now include live js code
Small improvements of the documentation
Merge pull request #69 from oz123/sphinx_doc

Sphinx doc
fix images - clean of readme / introduction documentation
little update in documentation index page
documentation - fix height / width of charts
restructure chart examples
fix chart height
Update of NVD3Chart

Extend documentation, and make most class attribute instance
attributes.
Add attributes related to pieChart

* These were removed earlier from NVD3Chart base class
pep8ify
Merge branch 'develop', remote branch 'areski/develop' into develop
Introduce template inheritance
Merge pull request #70 from oz123/demo_template_inheritance

Demo template inheritance
Merge branch 'develop' of https://github.com/areski/python-nvd3 into develop