Add: Handling input/output sequences via Python
Add: Output Sequences for SOFA exporter and example.
Add: Multicore support for sequences. Quick-and-dirty-fix for #93. Cleanup needed.
fixes, debug output
Merge branch 'master' into lightweight_sequences

Conflicts:
	src/msml/model/alphabet.py
Add: defaults, sequence and multicore for ShellOperator
Fix: CGAL s2v.
Merge branch 'master' into lightweight_sequences

Conflicts:
	operators/CGALOperators/CGALOperators.cpp
	src/msml/exporter/sofanew.py
Small fixes
Ready for pull - TODO: fix RuntimeError: maximum recursion depth exceeded
Merge branch 'lightweight_sequences'