added fastFilteredDistance
add use of fastFilteredDistancesTo
added strip_backbon
Merge branch 'debug' of https://github.com/skoppula/statium into debug
two major fixes: matching sidechain thresholds, performance speedup (hashing less)
added support for filtering sidechains/or not and stripping backbone atoms/or not
updated README
remove preprocess pickle function
remove preprocess import
add defaults for quickruns backbone/filter sc
remove debug elements