Most of the dialplan UI now works! Lots of visual tweaks still need to happen

Most of the dialplan UI now works!  Lots of visual tweaks still need to happen
to really make it look sharp, but most of the envisioned functionality is in
place.

The ability to save changes it not yet present.

One known bug at this point: Renumbering a priority to an existing priority
seems to work.  However renumbering a priority to an empty slot
results in an empty target (the source prio is not saved).  Not sure why yet...

git-svn-id: https://svn.alkaloid.net/gpl/shout/trunk@97 06cd67b6-e706-0410-b29e-9de616bca6e9