Add admin users mobile_phone field, mainly for future support of two-factor-auth
Merge branch 'v160' into add-admin-cellphone-num

Conflicts resolved:
	zc_install/sql/updates/mysql_upgrade_zencart_160.sql
Merge pull request #168 from drbyte/add-admin-cellphone-num

Add admin users mobile_phone field for future 2-factor-auth