CK with support for ck-crowdnode and new tests
Changes:
- fixed bug in 'remove_action' in CK kernel
- fixed issue in "run_and_get_stdout" on Windows
- printing module UOA in square brackets when error (useful for debugging)
- added 'shell' parameter to kernel 'run_and_get_stdout' function (needed for ck-crowdnode)
- added 'eout' function to kernel to print to stderr (useful for ck-crowdnode-server)