[CM] Grace: realtime audio with Csound5

[Rick Taube]

the csound port in grace seems to be working on linux, at least in  
the studio64/hardy environment. I had to install portaudio and build  
csound with portaudio enabled even though im not using it and then  
its happy.

i was able to sprout multiple i1 processes that cranked out audio in  
realtime. the only things im noticing on linux that I don't see on  
macosx  are:

(1) when i use the mouse i get lots of csound messages like:
	WARNING: Buffer underrun in real-time audio output
(2) when csound is open  the mouse periodlically turns into a  
spinning "in progress" wheel for a second or so even when im doing  
nothin. im not sure yet what this is due to

(3) for some reason I cant copy text in firefox and paste it directly  
into a grace editor buffer. i have to first paste it into an emacs  
buffer, then copy/paste that and paste it into the grace buffer. im  
not sure what this behavior is due to, ie if its a juce issue or if  
this is normal copy/paste behavior between apps on linux.

best,
rick