Change version to 11
Editor now dialog based (cleaner & more portable)
Add support lib and ViewPager on deadline list

Doesn't load for now
FIX first day of week in calendar view #15
Create ContentProvider

Cover 90% of DataHelper features
Home uses now a ViewPager
Cleanup DataModel references

Bring back group filtering too.
Cleanup DataHelper (-> DBHelper)
Remove last usages of DBHelper
FIX Deadline lists auto-refresh
FIX group list auto-refresh
FIX Done state changing on modification
Rewriting of NotificationCenter

Now uses the ContentProvider architecture.
Change default locale to EN (#18)
Flag non translatable resources
[Feature #17] Bulk group edit on multiple elements
Remove unused resources
Get rid of DeadlineModel
ADDED share by url feature
Factorize color retreiving by level