LimeSDR support fix
Binary releases are compiled with the latest version of LimeSuite (commit 04b57e0) to fix segfault when using only the second channel or starting the second channel first.
Web API updates
- /sdrangel/deviceset/{deviceSetIndex}/device/run POST,DELETE to start/stop a device implemented for all source and sink plugins
- added more client examples in a dedicated folder and added a readme: https://github.com/f4exb/sdrangel/tree/master/swagger/sdrangel/examples
- use message passing to start/stop device
- /sdrangel/deviceset/{deviceSetIndex}/channel/{channelIndex}/settings PUT, PATCH for NFM demod and mod
Other updates
- added test in main CmakeLists.txt file to abort build if gcc version is lower than 4.9. Older versions cannot compile std::regex correctly.