Converted SVN externals to Mercurial subrepos.
update tags
Split from braid-projects and update externals.
Update MATLAB_MEX_LINUX for Matlab 2012a.
Added a .hgignore file.
Kludge to loop.plot to add customization options (undocumented in help).  In dire need of cleanup.
Check for coincident particles in color_braiding.  Resolves issue #2.
Resolve issue #3: If the crossing string is not the one on the right,
start looking for a simultaneous crossing.  If we find one, then swap
and use that crossing instead.
Michael wrote a version of plot.m for loops (plot_mod.m) that takes text options.  Still testing.
Make a figs_lo folder for docs.
Added .hgignore (and to braid-code).
Updated version of braid-code.
Added a section on filling-in punctures, which clarifies earlier confution.
Added a footnote on minimum entropy.
Added some more refs on small entropy.
Added TODO about Burau.
Added a note about pure braids and Song2005.
Remove extraneous paren.
Sort out labels and spell check.
Added README.md