moses: fix merge conflict
Merge pull request #976 from linas/moses-select4

moses: fix merge conflict
moses: fix compile error
Merge pull request #977 from linas/moses-select4

moses: fix compile error
moses: cache the best-possible bscore for ctruth tables
moses: Add ability to subtract two behavioral scores
moses: float vs. double precision limits
moses: More behavioral score compatibility fixes.
Work around another build break
moses: work around failing test case.
moses: Fix another breakage.
Merge pull request #978 from linas/moses-select4

Moses: fix assorted build and test breaks
Add TTable::from_string (easier access to string to date convertion)
Add unit test for timestamp feature