started to update docstrings to numpy standard
Merge branch 'master' of github.com:biocore/bipy into sequence-doc
addressed comments from @jrrideout
fixed failing doctest
add licenses directory

Includes scipy and sphinx-bootstrap-theme licenses. Necessary because I copied a couple of files from their sphinx documentation areas.
Add sphinx doc area

Uses layout similar to numpy, scipy, and pandas, where each function, class, method, attribute, etc. has its own page.

Uses sphinx-bootstrap-theme and numpydoc. Currently only links to bipy.core.distance documentation.
periodic commit - updated a lot of doc strings
update travis to test doc building

Tests building of docs (no errors or warnings) and links.
fix sphinx-bootstrap-theme name
conda doesn't have sphinx-bootstrap-theme

moved to an explicit pip install command
updated a lot more doc strings
update numpydoc version in travis conf file
add strict checking in sphinx makefile
complete first pass through the doc strings
pep8 fix
Move bipy.core.distance exceptions to exception.py

Fixes #123.
added module-level documentation
various clean-ups through-out
various clean-ups through-out
modified to use scipy.spatial.distance.hamming - fixes #61