Blender Git Loki

GP "Add Monkey" - Make this behave like a standard "Add Object" operator

* "Add GP Object" operator now works in Edit/Paint modes (so the button
in the Create tab works)

* Multiple "Suzanne" objects can be added within the same GP datablock now
(if in Edit/Paint modes when activating the "Add GP Object" operator)

* "Radius" operator property is respected, albeit, setting this to values
other than 1.0 may result in weirdness as the line thickness values do
not get adjusted.