bump version number to 1.3.4

bump versionnumber to 1.3.3

bump version to 1.3.2

fix: Tasks added without due date not showing in home screen #79 & bu…

…mp version number to 1.3.1

bump version number to 1.3.0 and buildnumber to 21

Bump version to 1.2.7+20

bump version to 1.2.6

Update README.md

update 15.txt

v1.2.3: Calendar week-start setting, Android nav bar fixes

- Add Week Starts On preference for all calendars and date pickers
- Fix note content obscured by Android 3-button navigation bar
- Make system navigation bar color match app theme
- Enable swipe-to-open drawer gesture
- Improve FAB positioning with system navigation bar