move to tracking flag version, tests do not pass
working on aliases
try to use multiset to hold possible alias matches
ready to multithread
added multithreading, but alias analysis has race conditions
still working on alias problems
use bug_group_map
remove incremental, add to docs, try to fix thread shutdown code
doc update
begin fix on glob's suggestions
fix for glob, incomplete
fixing bugs in test, prep for switch from Null to None
most changes from Null to None, start debug of tests
removed use of len(list)==0 and replaced with Pythonic version, begin run of tests
turn off profiling
remove old comments index when done; do not add alias during index creation; try different analyzer; add comments reference
remove starup class
rename parse_bug_history_ to BugHistoryParser
fix comments, less 'art'
move Q from class to module