Merge pull request #53 from nkindlon/master

Merge converted to PFM, first check-in
allow merge -d to have negative values for minimum overlap.
add missing help menu items (-S -header) to merge
cleanup KeyListOps help formatting
cleanup unit tests.
allow command line includes for make
support for operators 'X' and '=' in method BlockedIntervals.cpp/GetBamBlocks
Merge pull request #63 from lindenb/fixBlockedIntervals

support for operators 'X' and '=' in method BlockedIntervals.cpp/GetBamB...
Update BlockMgr.cpp
Test commit