Delete .hgignore on develop branch as well.
Oops!  databraid.eq was totally wrong.  Writing unit tests is good...
Oops 2!  databraid.eq was still not right.
Copy braid word first to avoid tcross errors in databraid.tensor.
Check for commuting blocks of generators in check_tcross.  Resolves issue #94 (again).
Added lots of unit tests for databraid, which uncovered several bugs (issues #93,#94,#95,#97,#98)!
Split off sort_sim_tcross from check_tcross (see issue #97).
Fix databraid.eq to handle commuting blocks of simultaneous times.  Resolves issue #97.
Merge branch 'develop' into release-2.2-branch