Peter M. Groen / openhantek

This makes the device accessible to users which currently have an active session
on the machine, not requiring any UNIX group memberships.

fixes #80

* Fix spectrum display: The loop was controlled with a different variable than the previous loops.
* Update control.cpp
* Update Readme (OSX information added)
* Support for software trigger (for 6022be)
* Samplerate support for 6022be
* Add install information for 6022be
* Utilizing enums count value to make code easier to maintain
* Beautifying
* 6022BE: Make samplerate adjust to chosen timebase.

The product of samplerate and timebase (x10) specifies the number of samples
needed to fill up the screen horizontally.
Based on the record length, the system was able to configure a timebase
when the samplerate was changed.

Code exist indicating this should also work in the opposite direction. I.e.
when changing timebase, the samplerate should adjust.

This has been fixed to also work now for 6022BE

* Fix bug that displays thick lines for printing due to non default cosmetic pen
* Add color settings for printing

...to match the filenames produced by the extractfw tool.

...for now, until I sort out proper packaging.

...and simplify the build system. Now that this is a maintainer-only
tool, it doesn't need autotools. You just need to type "make".

I'll deal with the udev rules file in a future commit.