fix bug 834313 - add kpi app with metric model

fix bug 834315 - use metric model to record l10n coverage

clean out un-used files

test for l10n coverage cron job
Use url() for docs links
Merge pull request #843 from darkwing/cms-urls-py

Use url() for docs links
Remove PHPBB crap
fix bug 778289 - Don't require attachment comment/desc
fix bug 834300 - attachments from ATTACHMENT_HOST

Only serve raw attachments when requested on the ATTACHMENT_HOST as configured
in constance.
Merge pull request #845 from darkwing/phpbb-cleanup

Remove PHPBB
Merge pull request #846 from darkwing/attachment-comments-778289

fix bug 778289 - Don't require attachment comment/desc
fix bug 777361 - Keep querystring values when logging in and out
Merge
Merge pull request #844 from darkwing/querystring-login-777361

fix bug 777361 - Keep querystring values when logging in and out
(some) pep8 cleanup
Merge pull request #842 from groovecoder/metric-model-834313

fix bug 834313 - add kpi app with metric model
fix bug 782900 - Localize string
Merge pull request #848 from darkwing/localize-782900

fix bug 782900 - Localize string
fix bug 779499 - Implement legacy redirects
Merge pull request #849 from darkwing/legacy-redirects-779499

fix bug 779499 - Implement legacy redirects
fix bug 810362 - Add dash link
Merge pull request #850 from darkwing/dash-console-810362

fix bug 810362 - Add dash link
move from constance to settings