Merge pull request #6 from petr-tichy-gd/master

BUGFIX: do not fail when "internal_role" field is empty
version 3.8 - removed incositency in project disable
version 3.8 - removed incositency in project disable
version 3.8 - removed incositency in project disable
version 3.13 - added validation of source files
version 0.4.0 - added thread support for user_project creation. The old muf_project and user_project files will be automaticaly migrated on run
version 0.4.1 - Fixed minor validation issues
version 0.4.0 - added thread support for user_project creation. The old muf_project and user_project files will be automaticaly migrated on run
version 0.4.0 - added thread support for user_project creation. The old muf_project and user_project files will be automaticaly migrated on run
version 0.4.0 - added thread support for user_project creation. The old muf_project and user_project files will be automaticaly migrated on run