libserialport: new package

libserialport is a cross-platform shared library for serial port access,
written in C.

It comes from the sigrok project, but has no dependency on sigrok code.

Homepage: http://sigrok.org/
librevisa: new package

It's an implementation of the VISA standard (for instrument control).

http://www.librevisa.org/
libsigrok: new package (TODO: add librevisa)

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/