Added missing workflow writer elimination of traits_version

Added more logging

Removed __traits_version__ from model getstate

Added indentation to json output for better readability

Removes the __traits_version__ when dumping the state with __getstate__()

Introduced log file option

Bumping version to 0.2.0.dev0

Added installation instructions

Introduced interface for FactoryRegistryPlugin

Release 0.1.0

Removed ZMQ toy server used for initial experimentation

Create probe classes for tests

Merge branch 'create_probe_classes_for_tests' of github.com:force-h2020/force-bdss into create_probe_classes_for_tests