Merge pull request #2 from jgrewe/master

Update of master branch with sourceforge commits
initials for dual beat plugin
some more, not compiling...
compiling version
remove attenuator, set 2 output channels
added parameters, rearranging them, enabled eod tracking
add event for handling button pressing
both signals working
increase sampling of outputs
ups, forgotten
stop of stimulation and restart work
add labels to indicate rewarde site
enabled random selection of rewarded stimulus
increased amplitude resolution
cleanup etc.
minors
rename of stimulus labels
make more settings configurable
add radio button to disable randomization
downscaling of stimulus amplitude to peak to peak