Merge pull request #2261 from RosettaCommons/yhsia/SSCountFilter_edits
Adds a few options to SecondaryStructureCountFilter.
adds residue_selector option to only count the SS elements from a subset of residues. Defaults to "all residues" as of the original behavior.
add option to actually return a value to the score file. Defaults to 0 (original behavior).
add option to specify how many residues (of the selected subset) are on each SS element before a SS element is counted. Defaults to 1.