Change version code and name in manifest
DatePicker added to task screen

User can now select a date on the edit task screen, but it isn't connected to
anything yet.
Dates associated with tasks

Dates are now associated with tasks and can be edited when the task is added or
edited. Default date on task creation is that day. Versions scheme also updated.
Version plan updated
Minor streamlining

ToDo activity now only passes relevant task and date to DefineTask activity
instead of all of them. Should speed things up slightly.
Versions plan updated.
Merge pull request #1 from drewleonard42/streamline

Streamline
Merge pull request #2 from drewleonard42/0_1_1

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