story auto close initial support.
update story auto close.
Merge branch 'master' of /opt/alminium/vendor/plugins/redmine_backlogs into story-autoclose
config to disable story auto close and the function is disabled in default now.
Initial requirements for Release-feature
Make backlogs issue history-function usable for release history.

Possibly candidate of refactoring to move sprint specific logic away from history().
Initial rework of release graph
Update new release graph to use unified journal
Updated CSV export for new release graph data
Merge branch 'master' into bohansen_release_chart

Conflicts:
	app/models/rb_release.rb
	app/views/rb_release_burndown_charts/_burndown.html.erb
	config/locales/fr.yml
Merge branch 'master' into bohansen_release_chart
Merge branch 'master' into bohansen_release_chart
Merge remote branch 'backlogs/master' into bohansen_release_chart
Corrected sprint selection for release
Added spent hours vs accepted points to scrum stats
Add rounding of scrum stats values
Hide projects from scrum statistics if they are not visible for current user + added project setting to show/hide a project from scrum statistics.
Added test for show_in_scrum_stats setting
Falling back to 1.8.7 compatible rounding to a specific precision.
Merge pull request #726 from backlogs/scrum_statistics_various_fixes

Scrum statistics various fixes