hack in discrete adaboost scorer, for now
Add minor commentary
Expand the deme_expander documentation
misc mior cleanup and documentation
Move old, unused code out of the header file.
Performance optim: don't sort deme if not neeed.

Sorting is only used when the deme is trimmed. So don't bother if
trimming isn't done.
Dust off a parallel algo.
restructure deme merging
Simplify, speed up deme merging

This removes a silly check that simply wasted CPU time, and also failed
to do what was claimed: provide thread safety. It was racy: you can't
check something, release the lock, and then do it. That isn't safe.
More metapop merge code cleanup, documentation
Merge pull request #862 from linas/dmos

Moses metapopulation cleanup, tuneup.