minor cleanup
Added async loading of database and async storage of entered data.
Added date field + datepicker popup + storage of date value + display of stored date value + correct timestamp value + display of timestamp value
Min version changed from level 8 to level 9 + added support for dialog result of data storage. No longer redirects to new activity.
Renamed to workhour_list activity + added menu item for opening the workhour list
Added confirmdialog upon storing work hours
Added preference activity and setup + rename of hourlist + minor cleanup
BUGFIX: added missing manifest declaration
added gui shell for hour reporting + cleanup and renaming
Added feature: Empty input after each new successful register of workhour.
Modified stored dateformat, to a valid format handled by sqlite3
Added basic report logic to the work hour report activity, sixmonth and yearly.