Parameters: Load/display description, unit metadata from excellent APM MissionPlanner ParameterMetaData.xml if present in 'Parameters' directory (TODO: ranges, values)
Parameters: Metadata - select metadata vehicle type from Settings -> Advanced -> Parameter Metadata [ None (default), ArduCopter, ArduPlane, ArduRover ]
Parameters: Use connected vehicle type to auto-select parameter metadata type if connected, use configured value if offline.
Parameters: Extracted parser code from Parameters -> ParameterMetadataMapReader, renamed .loadMetaData(...) -> .loadMetadata(…), renamed .getMetaData(…) -> .getMetadata(…)
Parameters: Use ParameterMetadata.xml if present in Parameters directory, else use built-in ParameterMetadata.xml in resources (assets) by default
Merge pull request #344 from bob01/master_parameter_metadata

Parameters: Use APM parameter metadata if available when editing parameters
Merge branch 'master' into custom2

Conflicts:
	DroidPlanner/src/com/droidplanner/drone/DroneInterfaces.java