libsigrok: new package

libsigrok is the core library of the sigrok signal analysis software
suite, which I'm about to package.

http://sigrok.org/
libsigrokdecode: new package

libsigrokdecode is a protocol decoding library for the sigrok signal
analysis software suite.

http://sigrok.org/
sigrok-cli: new package

This is the command-line frontend for the sigrok signal analysis
software suite.

http://sigrok.org/