- changed test runner protocol

- added some catches for main test executing calls

- changed the protocol specs so that the program exit code and the expected program exit code are separate items (to display test content)
  - the program exit code is always the first item (if present)
  - the expected exit code is the second or first item (second only if we have a real program exit code as first item)

- updated docs
- added version string

- made firejail compatible

- moved parameters max lines to read, max err lines to read, max lines to write to the test server (from test runner)
- updated readme

- warning output added
  - we get an error from time to time because we canno delete a temp dir...

- added debug output when runner outputs to the error stream

- the execution of the user program was just fine (the java encoding) but the RUNNER was NOT called with utf8 encoding...

split code into (some) modules
added hard limits
changed interface