Update theme to sphinx_rtd_theme:03133fca with color updates.
And once again force styling when built on RTD.
Update tutorial.rst
Update tutorial.rst
update total correlation examples
spruce up measures.rst
normalize heading levels in the documentation, beef up gk
add back the residual entropy
add \K macro, use it.
talk more about GK
Hack: Remove badge since RTD injects one.
Add .mfrac{color:#404040} so that fraction divider color matches.
Merge branch 'master' of github.com:dit/dit
add more notation, describe more about gk
add one more clarifying sentence
fix dit.js, minor tweaks to gk and tc
fix type in notation
flex out the notation more
add equation and citation to binding information
add some token info about the n-variable gk