Jay Tools Improvements

- Simplified code for the modifier operators

- Added selection aware to several operators, such that they're greyed out when nothing is selected.

- Reorganized the Edit Mode menu

Signed-off-by: Jonathan Williamson <jonathan@cgcookie.com>
Updating Jay Tools to most recent dev version.

Updating from /development.

Signed-off-by: Jonathan Williamson <jonathan@cgcookie.com>
Boolean Operators 0.4

- Cleaned up a lot of code based on Campbell Barton's suggestions.

- Added the Wiki and Tracker URLs

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