re-project: operators for projecting from a view screenshot rather then a camera.

- new mode for projecting an image with the view matrix saved in the image id-properties rather then using the camera matrix.
 - operator to screenshot the view and create a new image with the view matrix stored in the image.

these will be used for better re-project integration and are not immediately very useful.

release/scripts/ui/space_view3d_toolbar.py

@@ -909,7 +909,7 @@ class VIEW3D_PT_tools_projectpaint(View3DPanel):
 
         sub = col.column()
         col.operator("image.save_dirty", text="Save Edited")
-        col.operator("paint.camera_project")
+        col.operator("paint.project_image")
 
 
 class VIEW3D_MT_tools_projectpaint_clone(bpy.types.Menu):