Blender Git Loki

* Corrected the lamp outer dotted circle drawing - the dotted outer circle
represents whether shadows are on for that lamp or not. Now, it properly
takes into consideration what type of lamp it is, and whether it can have
whatever type of shadow.

Things like this, and the inner spot circle representing the Spot Blur should
really be documented somewhere, I'll make a note.

* Decreased the size of the hemi lamp arcs.