Odds and Ends

[chrisdicaprio]

Some thoughts on how to improve the classes that have come up while working on them:

• change member name in source classes from nrml_id to something that is not tied to openquake (be hazard engine agnostic)
• do we need the type member of the source classes? It's possible to set them to something that doesn't match the class (e.g. "distributed" for a InversionSource)
• should we even have DistributedSource and InversionSource? Should we just store any meta data (inversion id, etc.) in a class dict?
• should we at least have a generic base class for sources to use when neither DistributedSource nor InversionSource fits the bill? We may, in the future, have inversions that also include the DSM
• elevate SLT version2 to 1st class
• move values to Branch base class (GMCM LTs also have a structure)?