Comment 1 for bug 731403

There are 2 pre-requisites to provide an accessible Dash, being:
1/ keyboard navigation support
2/ nux accessibility classes

#1 is implemented and was released as part of alpha-3
#2 is implemented as well, and is used to provide accessibility for the launcher

The missing part is to connect the keyb. navigation and focus change signals to the same atk infrastructure that is now built into Unity.