Add methods to the dialog picker.
Optionally set mCurrent. Fixes mrn/numberpicker:#21.
Merge pull request #20 from CoatedMoose/dialog-tweak

Add methods to the dialog picker.
Merge pull request #21 from CoatedMoose/issue-21

Calling setRange after setCurrent overwrites currently selected item
Get the numberpicker from the dialog.
Keep old picker setters in dialog, but mark deprecated.
Fix whitespace.
Merge pull request #22 from CoatedMoose/framework-consistency

Get the numberpicker from the dialog.