*) configure: check gdk headers
  *) switch-server: automaticly restart composite
  *) testing only random-connections
allow selecting different test cases in the test suite
add staging script -- build everything from zero
improved staging script
refactoring staging scripts
add --force switch to scripts/stage
install libvpx from the git repository
install libvpx v1.2.0
build libvpx v1.2.0 with enable-shared
remove ended streams
test: trun off external server and UI
enhanced tests & bug fixes
refactoring
split switch client from switch UI
mark "active" audio
unref ended active audio
ui: locking compose video
ignore invlaid audio port
show red frame on active audio preview box
add test case for control port