Quick Tools 0.7

This release brings a couple additions to each menu.

Object Mode:
- Delete Grease: to easily delete the current grease pencil frame

- Object Display Options submenu: allows easy toggle of Double Sided and solid wireframe

Sculpt Mode:
- Sculpt Display Options submenu: allows easy toggle of Double Sided for increased performance

Edit Mode:
- Delete Grease: same as in object mode.

Signed-off-by: Jonathan Williamson <jonathan@cgcookie.com>