Merge pull request #5 from dskarls/master

Dan:Fixed dates & backslashes in Matt's properties
Merge pull request #6 from dskarls/master

Dan: rm lingering misnamed property
normalized broken bond fit errors to relaxed energies
corrected definition slightly based on YJ's code
Merge pull request #7 from mattbierbaum/mattprop

Mattprop
Fix description of 'cohesive-energy'
Dan: Fixed cohesive energy descriptions