Remove dependency on NetworkX.
add the total correlation
simplify, and add optional conditioning
add tests
make total correlation work on arbitrary sets of indicies
add one more test
add coinformation
fix for overlaping variables
add tests for coinformation
add some rv names to tests
add some rv names for testing
update docstring
Merge pull request #5 from Autoplectic/total_correlation

Add the Total Correlation
Merge remote-tracking branch 'autoplectic/coinformation'

Conflicts:
	dit/algorithms/__init__.py
Whitespace.
Python 3 compatibility: iteritems -> items
Tell coverage to report import errors.
Comment out scipy and matplotlib from travisCI setup.
Fix how we move into dit installation directory for travisCI.
Actually move *into* dit installation directory.