Add plugin translator loading.
Catch exceptions from plugin translation loading.
Describe how to add translation to a plugin.
Setup root level logger instead of vitable ones.
Remove code that searched plugins through folder scanning.
Add debug on plugin loading, disable not loaded plugins.
Clean up pluginsloader module.
Add exception catching while loading modules.
Add default about page class for plugins.
Convert columnorg plugin into setutools entry point.
Convert import_csv to entry point plugin.
Convert export_csv to entry point.
Convert dbstreesort to new plugin system.
Convert timeseries plugin to the new system.
Replace plugin discovery system with entry points.

Build in plugins were converted to the new system. Bring some plugins to PEP8
conformance. Add ability to load plugin specific translation.
Fix db sort plugin, remove future import as it conflicts with guidata.
Fix use before assign in columnar org.
Fix a couple of bugs in plugins.
Create calculator dialog and add menu entry.
Add init to calculator module.