Updated Catch2 to version 2.13.10 (from 2.13.09).
Added a benchmark test (49_05) for Asynch ZMQ requesr-reply. Also fixed an error in testcase 49_04, which didn't use asynch communication everywhere (used synch instead).
Fixed and finished test 49_04 (working)
Added a test (TEST_CASE_49_04) for asynch communication using the ZmqTxRx-class. Also fixed some bugs in ZmqTxRx.
Added a benchmark test for synchronous Req-Rep communication over ZMQ. Also made some minor clean-up after running code checker.
Ini-file reader/writer for PSM settings
Added a fully functional, synchronous socket, Request-Reply cycle to test 49_02.
Synchronous Req-Reply transmission works accoring to test case 49_02 (not yet finished).