version 0.2.0
- Added %L>% as synonym to avoid possible confusion with pipeR::`%>>%`
- Argument 'stop' of 'dump_log' is now 'TRUE' by default (was 'FALSE')
- New logger named 'filedump' dumps data versions to csv.
- Function stop_log() will now call <logger>$stop() if defined.
- Package now depends on R >= 3.4.0. Some tests failed on Windows/OSX + R3.3.3

version 0.1.0
- initial release
