Fix observation serialization, toJSON is not recursive (but stringify is)
Merge pull request #83 from jmfee-usgs/fix-serialization

Fix observation serialization, toJSON is not recursive (but stringify is...
convert reading/measurement models toJSON
Merge pull request #84 from jmfee-usgs/fix-serialization-2

convert reading/measurement models toJSON
Updated hazdev-webutils to 0.0.8, removed no-longer-needed calls to toJSON
Merge pull request #85 from jmfee-usgs/fix-serialization-3

Updated hazdev-webutils to 0.0.8, removed no-longer-needed calls to toJS...