- squash modbus library into silecs library, so that no extra-linking
will be required

- only a single SILECS_VERSION folder, all silecs packages are below
- separate snap7 folder, versioned idependently
- link 'latest' to most recent snap7 folder

- As well install silecs-diagnostic-cpp

- Explicitly include all Qt headers
- runs on acc8 now

- Usage of "rpath" in silecs-cli-client so prevent the need to set
LD_LIBRARY_PATH

- moved/simplified install script
- added build steps to cli-client

Support for FESA Version: 7.3.0
- Add unit tests for Fesa 7.3.0
- Run unit-tests only for latest FESA version

- print needs braces now
- type 'long' does not exist any more --> use 'int'
- use encode() toget byte string
- ignore __pycache__ files
- strictly use integer, to prevent float notation