fix string return in Python API
Merge branch 'feature/py-docs' into dev
Python class diagram (in progress)
streamline python tests
add flags to match metrics
methods for querying germline segment match
germline segment match query test
Merge remote-tracking branch 'github/feature/py-docs' into dev

Conflicts:
	binding/python/segment_match.cpp
display SVG as embed
Merge branch 'feature/py-docs' into dev

Conflicts:
	doc/py_index.txt
class diagram with hyperlinks