Version 0.9.12: Fixed drawing of arcs when unit is feet
Version 0.9.11: Correct drawing of counter-clockwise arcs
Version 0.9.10: Added support for importing and exporting arcs
Version 0.9.9: Drawing arcs works again (fixes regression in 0.9.8)
Version 0.9.8: Enabled setting of zenith angle
Version 0.9.7: Added support for gradians
Version 0.9.6: Buttons now have text labels again (fixes regression in 0.9.4)
Version 0.9.5: New controls in options tab for calculating offset (completed by
TechnoglogyOne, Australia, funded by Knox City Council, Australia)
Version 0.9.4: New dock widget UI. New icons for buttons. Feature to use last
point as start. Draw temp line.(completed by DMS, Australia, funded by Knox City
Council, Australia)
Version 0.9.3: Added snapping marker when picking the start point and drawing
arc support (completed by DMS, Australia)
Version 0.9.2: Added support for drawing into active layer (completed by DMS,
Australia)
Version 0.9.1: Fixed no segment draw and coordinate offset bugs
Version 0.9.0: Updated for QGIS 2.0
