Blender Assisted Design (BAD) is a helper script to make precision modeling
easier with Blender.

To install simply copy (or link) the bad/ directory to ~/.blender/scripts/
directory. After that BAD will appear in Blender under Scripts->Mesh menu.

After starting BAD you may want to also enable BAD space handler for your
3D view from View->Space Handler Scripts->BAD . This enables you to get quick
access to BAD features by pressing the 0 (zero) key on your keyboard.