Nyall Dawson f6f5010131 Move QGis::UnitType to QgsUnitTypes::DistanceUnit
This change consolidates more unit handling and conversion into
QgsUnitTypes.

Additionally, UnknownUnit was renamed to UnknownDistanceUnit.
All methods which accepted QGis::UnitType parameters have been
updated to take QgsUnitTypes::DistanceUnit instead.

ALso remove the unit handling methods toLiteral, fromLiteral, tr,
fromTr, and fromUnitToUnitFactor from QGis. Their corresponding
counterparts in QgsUnitTypes should be used instead.
2016-07-25 14:47:16 +10:00
..