Sarpy

Added
- Added test for SARPY to/from XML logic.
Fixed
- Fixed AntGPid typo to AntGPId.
- Fixed SARPY correctly finding TxAntenna/RcvAntenna PVPs using from_file in cphd_consistency.py.
- Fixed SARPY correctly specifying EBFreqShiftSF in AntPatternType.
- Fixed SARPY correctly handling AddedParameters as a single element with repeated Parameter children.
- Fixed EndPoint type to Endpoint.
- Fixed SARPY correctly including index as a child element instead of an attribute in LSVertexType.

Added
- Added RadarModeType class to SIDD with SCANSAR option.

Added
- Added 3db contours to transmit and receive beam footprints for CPHD KMZs.

Added
- Added additional tests for sicd_elements ImageCreation.py.

Added
- Added additional tests for sicd_elements CollectionInfo.py.
Fixed
- Fixed bug in SARPY correctly checking mode types.

Added
- Added additional tests for sicd_elements Antenna.py.