* check qcam plugin; it includes source of the qcam package that might
  be librified

* check xvideo; the flags need better handling but first try to understand
  it better ;)

* check SDL optimisation flags

* check GST_* in configure.ac, there is too much in it

* decide where to put the control lib

* work on spec file :
  add plugins with AC stuff (maybe from bits ?)
  write script that builds rpm's one from one
  get postun script right; gstreamer-register should be installed for example