DOC: Add coding guidelines ported from pycogent

A lot of work has to go in still but at least it is being indexed in the
front page of the documentation.
DOC: Change camelcase to undersocres and add dm

dm is a valid abbreviation for distance matrix.
DOC:Add note about using PEP8 for name conventions
DOC: Add note about imports of matplotlib, etc
DOC: Add note about documentation
DOC: Minor updates to the module docs/imports
DOC: Fix link and add class level doc example

The numpy link had the incorrect casing hence nothing was going to be
linked to it.
Merge branch 'master' of git://github.com/biocore/scikit-bio into guidelines

Conflicts:
	doc/source/index.rst
Merge branch 'master' of git://github.com/biocore/scikit-bio into guidelines
DOC: Update How should I format my code? section
DOC: Reorganize to make PEP8 more evident

It should be immediately clear that we follow PEP8 conventions for
variable, function, module, namings, etc.
DOC/BUG: Fix RST directives to render code
DOC: Update section about testing
DOC: Update test suite example
DOC: Fix and update some minor problems
DOC: Add section about git fixes #272

(•_•)
<)   )╯Damn
/    \

\(•_•)
(   (> Right,
/    \

(•_•)
<)   )>  dudes.
/    \

ASCII art authored by https://twitter.com/guiltyx
Merge branch 'master' of git://github.com/biocore/scikit-bio into guidelines
DOC: Add note about Travis CI
DOC: Expand the docs and remove useless text

Thanks for all the helfpul comments and suggestions @adamrp, @wasade and
@gregcaporaso.
DOC: Fix typo forlder -> folder