made pause an info variable so jack(and other audio plugins) can sanely
handle outputing null/0 while paused, fixed jack change buffer and samplerate,
Pause/Play and Reset should now work properly.

as a result SSM will now always try and follow Jack settings while attached.

at any given point, so that changes to the audio subsystems can
be applied live(needed for jack).

this is also usefull in that it can give the ability for a Reset
button on the toolbar along side a play/pause button for being able
to at any point completely kill audio and reset to begining(usefull
for recording takes where you want it to start at specific point w/out
the delays echos etc overlapping for the first iteration.

This adds the ability to select multiple devices either by a ctrl-mouse drag
or by ctrl-click on individual devices title to do finer selection
and deselection, and then ctrl-right-click on the canvas to produce a menu
with the options to cut/copy/paste/delete selection or to merge an existing
patch entirely into the patch. Pasting or merging will auto-select new devices
so any old devices will lose selection.

To remove selection simply click anywhere on canvas.

Current problems -

Multiple Select drag is buggy and may select items not in the selection area.

Multiple OSS plugins are buggy so merging/pasting an OSS device can cause crashing.