Fixed an out of date comment.
Fixed comment typo.
Added basic Sphinx template.

This template does not really inherit anything from the
base yet.  I'm no where near done with this.  It's just
a starting point.
Added document level description and cleaned template up.

Note: Still need to fill in doc variables to load the
Sphinx format.
Made significant improvements to the Sphinx-Latex export
template.

The inheritance was cleaned up.  Currently no content is
rendered (that's a task for later.)  The important thing
is that the template can be built through the Jinja 2
structure and converted to a PDF using pdflatex.
Unfortunately it seems that Sphinx requires texlive-full
which is a huge dependency.
Updated README to reflect package requirements.
Fixed formatting error on README.
Removed unneccessary parameters that are now in
converters/base.py.
Got pdflatex to work on this empty sphinx styled template.
Renamed latex_sphinx to latex_sphinx_base
Split Sphinx template into sub-style templates.
Fixed profiles so they inherit from eachother.
Reverted changes to original sphinx template
Sphinx templates draw underlaying data from Sphinx classes.
Got both of the main template formats from sphinx rendering.
Todo:
 [ ] Fill with NB data
 [ ] Move latex around and make use of latex base
Reverted change accidently commited.
Removed full path names for latex dependencies, relative
used now.
Process header cells.
Removed unnecessary tabs.
Added rawcell formatting
Fixed missing new lines between blocks (prevent Jinja block trim)
Removed LaTeX comments
Moved latex comments in to Jinja blocks so they show in the
    compile file.
Added Jinja macro to make sure input text does not screw up
    latex.
Added simple text output for unkown cells.