Merge pull request #172 from EverythingMe/feature_imrpove_updater

Feature imrpove updater
Fix upload version script.
Merge pull request #176 from EverythingMe/feature_imrpove_updater

Fix: selection of true/false values in filters wasn't working.
Merge pull request #178 from EverythingMe/feature_imrpove_updater

Typo fix in import code.
Merge pull request #179 from EverythingMe/feature_imrpove_updater

CLI for data sources management
Merge pull request #180 from EverythingMe/feature_imrpove_updater

Fix: support for .env files without EXPORT
Report events at most once per second
Report event for viewing widget/visualization/query
Merge pull request #182 from EverythingMe/feature_events_throtle

Make sure events are reported at most once per second
Fix #185: when y value is null, convert it to 0.
Merge pull request #190 from EverythingMe/fix_185_null_values

Fix #185: when y value is null, convert it to 0.
Fix: job variable was used before assignment
Merge pull request #191 from EverythingMe/fix_185_null_values

Fix: job variable was used before assignment
Switch to multiprocessing instead of threading.
Remove atfork (it's not needed anymore)
Cleaner shutdown (#8)