matrix-gui-common: Move common files into one pkg

matrix-gui-common: Move common files into one pkg

* Created the matrix-gui-common_svn.bb recipe to contain all of
  the common html, scripts, and image files used by both versions
  of the matrix GUI application.
* Removed the html, script, and image files from matrix-gui and
  matrix-gui-e recipes.
* Added dependency on matrix-gui-common to matrix-gui and
  matrix-gui-e recipes.
* Added browser executable that looks for the example browser
  from the Qt demos package depending on whether the embedded
  or X11 version of the matrix GUI application is running.

Acked-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Chase Maupin <chase.maupin@ti.com>
Signed-off-by: Koen Kooi <k-kooi@ti.com>