Clean-up task queries with hardcoded date ranges

 * remove quries that has hardcoded number of days to get tasks for
 * update the client code to use the generic fromDateToDate queries
 * add getTasksOwnedFromDateToDateByDays(...) with list of statues as
   its needed by client code
Add basic javadocs to 'byDays' taskquries
- updating style for month calendar view