dictextension dict

Tag the 0.8.3 release.

Increment the version to 0.8.3 for another release.

Ticket #6 - Improve keyboard accessibility to the Closest Matches dialog
- Listbox is given focus by default.
- Enter on a listbox item looks up its definition.
- Esc closes the dialog.

Fix an inconsistency in the text for "looking up a definition".
Historically, this was referred to as "define", which is incorrect.

Fix problems with the "restartless installation" that prevented Dict from working on Thunderbird.

Implement support for restartless installation.

Fix a typo in a comment

Replace tab with space.

Ignore files which "gmake release" creates

Increment to a development version number and change the
locations where releases are dropped. The old location
was a restriction of mozdev.org, which no longer applies.