The simulator is not yet ready for usage but the changes on the
architecture are valueable for the master branch.
Therefore, I merged the branch with the following addition:
* Close the Simulator Tab whenever the program starts
* setup environment for native sdrplay support
* prepare stream callback
* add sdrplay class with error codes and pack complex method
* add receive callback for sdrplay
* add call in virtual device
* simplify unpack complex method
* improve initial gain setting
* remove debug prints
* sdrplay rx prototype
* make protocol sniff settings collapsabile
* move spectrum analyzer action to the top of signal actions
* make device settings collapsable
* improve collapse boxes
* fix collapse icon
* wrap live methods
* fix layout
* integrate methods
* fix gil problems when live setting parameters
* enable antenna selection for sdrplay
* add optional dependency to readme
* add winlibs
* improve device list output
* increase timeout for travis
* consider changed set gr for rsp1
