SCPI: Add a plugin/library for SCPI
	(Standard Commands for Programmable Instruments)

First cut - network based signal generators have been tested, others
need verification

Signed-off-by: Robin Getz <robin.getz@analog.com>
PROFILES: Move the loops around a little, so that the profile.ini file           is processed in order of the file, just just by groups of           plugins. This also means that the main capture profile is           processed just like all the other plugins, not seperately
ALL: Add two functions to create blocking and non-blocking pop-ups      to show a little info about what's going on
PROFILES: Use new functions to tell users how long it takes to load/process           the ini file.
PROFILE: get rid of compile warning
INI: When we hit an error, quit, stop processing, and return the line
     number of the error.

Signed-off-by: Robin Getz <Robin.Getz@analog.com>