v2.4.0 - Stable minor release - mainly rkd.process improvements

Stable release

Features:

• #71 rkd.process.check_call() has now output capturing callback
• #69 rkd.io has now support for output processing on-the-fly using add_output_processor()
• #36 task can have a separate, fixed working directory set in YAML, TaskDeclaration and in commandline

Bugfixes:

• #63 unicode decode error in IO
• #57 terminal display size is not resized when a terminal is resized (rkd.process)
• #56 Improved error message to be more descriptive
• #55 Improved error printing to show more clear messages instead of bigger stacktraces