Merge pull request #60 from thelabtech/MH-566

Change search for 'Contacts Updated From' based on last survey updated
Merge pull request #61 from thelabtech/MH-567

Fix import overwrite nil values and add a unique new phone number
Merge pull request #62 from thelabtech/MH-559

Add text message preview and add headers in character count
Fix search graduation date, add option format mm/dd/yyyy and yyyy
Merge branch 'MH-576' into dev