FlightMap:  Added waypoint labels
GuidePoint: changed text from [*] to [#]
Parameters: #225 - operator can enter fractions and signed numbers now
Parameters: localized numeric values, values rounded as per pattern (3 decimal places) on loss of focus
Parameters: validation of new values using metadata if available - GREEN=valid, RED=invalid, YELLOW=can't validate (metadata missing or broken)
Parameters: validation of known values (using metadata). Refactored 'range' & 'values' parsers into ParameterMetadata
Parameters: use bold typeface for changed values
Parameters: 'Edit' button on param info dialog -> list of valid values if provided by metadata for simplified editing
Fixed the aera function in Survey and changed the Aera method to display km^2 instead of m^2
Parameters: cleanup
Merge pull request #352 from bob01/master_parameter_edit_validation

Parameters: fix #225, localization, validation and list selection of known values
Merge pull request #350 from bob01/master_flightdata_wp_labels

FlightData: Waypoint labels for mission path displayed on flight map screen
Merge pull request #358 from bbasso/master

Fixed the area function
Updating the ChangeLog
Preparing for release v1.2.0