Merge pull request #6218 from RosettaCommons/roccomoretti/interactive_fsp3_filter
[Foldit] Fraction SP3 carbon filter.
Add a new objective that measures the fraction of SP3 carbons in a ligand. This is one of the parameters used in evaluation by the CACHE competition.
RELEASE NOTES: Add new objective to measure 4-bonded carbons in small molecule design puzzles.