AudioDeviceManager: never stop default devices once started
MIMO plugins documentation creation and related updates
Updated version and changelogs
Debian build: moved librtlsdr to external dependencies
Added possibility to specify devices that cannot be discovered automa… …tically. This implements f4exb#445
Removed obsolete signals causing unresolved references
UPdated version and changelogs
Fixed some MSVC compatibility issues
Removed some extra semicolons