Richard3

Increase Units Field Size:
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FieldCell.h Change UNIT_WIDTH 50 to 70
NumericPadViewController Unit field size.

Observation Cancel Confirmation
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ObservationViewController.m
1/ viewDidLoad: create Cancel button.
2/ onCancel: Pop-Up Confirmation Alert
3/ clickedButtonAtIndex: if Yes 
	Do not save Observation
	Delete Observation
	Dismiss this View
4/ viewWillDisappear: 
	Handle observation is nil