Added SMS capability
Fixed tab issues
Use spaces instead of tabs to align the carrier array
Send to Users removed
Changed "cell provider" to "mobile provider"
Fixed rogue backslash
Adjusted hint and strip tags on message.
Resolved bug with duplicate carrier values

When there were duplicate carrier values, Select2 failed to recognize the second.  As a workaround, carriers with the same value are combined.
Updated hint for mobile number
Added sanitization to the email created by phone number and carrier.
Standardized WP_Mail function
Merge pull request #170 from JeffMatson/master

Added SMS capability
Merge master into develop
Minor code formatting
Additional sanitization on mobile number in email address
Use mobile wording instead of phone or cell
Merge develop into stream-merge
Merge from remote stream-merge
Merge notifications-merge into develop