Update for app framework removal

Changes:
- Remove the autobuild scripts and config.xml used by the app
  framework widget build.
- Update the qmake files to just build a "settings" binary and
  install it into /usr/bin by default.
- Remove the code in main.cpp that handled reading the WebSocket
  command-line arguments and passing them to binding related
  code.
- Add initial .desktop file and icon copied from the launcher
  source tree, and updated .pro files to install them.

Bug-AGL: SPEC-4182

Change-Id: I7e519aa963f6f22a37d083b2743ad5d42ead9684
Signed-off-by: Scott Murray <scott.murray@konsulko.com>