renamed test.ctl to streamtest.ctl

to match the pipeline
configure audio and video delay
remove posX from font-control
getter for videoDelay
use video-delay getter
fixed setVDelay()

removed usage of non-existant variables
video-delay element needs seconds
removed text.x from configuration

we don't use it
removed posX controls; set maximum video delay to 1000ms
disabled debugging printout
allow setting of config-file when creating streamer
parse arguments for config-file

Closes https://github.com/iem-projects/striem/issues/5