Ecreall-dace

------------------

- Add a remove_unique_process_instances evolve step.

- Add a update_catalogs_evolve evolve step to update catalogs and reindex
new indexes programmatically.

- On SIGTERM, stop the system thread. It was already done for SIGINT but not
on SIGTERM.

- Can now execute process_definitions_evolve via sd_evolve script.

- Fix ConflictError at startup when using several workers.

- Fix tests with latest pyramid version.

- Add support for Python 3.6

------------------

- Add user_groups getter to User class, and now include roles from groups
when checking if the user has given role.

------------------

- Auto evolve TimeEvent if the definition changed.

- Fix the end of a sub-process.

- Optimizations of path finding to get the workitems.

------------------

- Fix an issue with automatic actions.

------------------

- Include mo files in the release.

----------------

- Initial version