Merge pull request #51 from mariogiov/devel

Finish CharonSession API methods
Merge pull request #57 from mariogiov/devel

Add custom CharonError exception type
Merge pull request #58 from mariogiov/devel

Adjust seqrun parameters to match Charon changes, adjust error messages/types slightly
Merge pull request #59 from mariogiov/devel

vezzi development w/merge resolution from mariogiov
pipeline working again
Merge pull request #60 from vezzi/devel

pipeline working again
Bugfix, CharonSession methods weren't returning
CharonSession access methods now return dicts instead of strings (via json.loads)
Bugfix when returning Responses from Charon