pepp'r 0.7.0

• Add RotamerViolations and RamachandranViolation metrics (#54)
• Changed atom matching paradigm (#53)
  • find_optimal_match() and find_all_matches() return matched AtomArray objects directly instead of atom indices.
  • These AtomArray objects retain all original atoms, matched atoms between reference and pose are indicated by the matched annotation.
  • To filter the referenceandposeto the common atom subsetfilter_matched()can be used. This will returnAtomArray` objects of equal length.
  • find_optimal_match() and find_all_matches() will also match structures partially if allow_unmatched_entities=True, meaning entire chains can be unmatched.