add a generalized XOR distribution
Add a list of contributors.
Merge branch 'master' of github.com:dit/dit
Update CONTRIBUTORS.rst
Update CONTRIBUTORS.rst
Update HISTORY.rst
Update CONTRIBUTORS.rst
Add local copy of mathjax, with some configuration. also add sphinxcontrib-bibtex
fix comment in conf.py, fix watanabe reference
add a short notation description
Merge branch 'bibtex'
Update conf.py

Update location of dit.js for MathJax.
expand total correlation docs
use macros in interaction information docs
Add a reference page to hold all references.
More notation.
Remove duplicate "Reference" header.
Add script to show/hide interpreter prompts from code snippets.
Merge pull request #42 from chebee7i/showhide

Add a button to code examples in docs to show/hide the prompts and output.
Unset explicit theme, allow readthedocs blue theme.