Update find_user.php

Changed the include statement because moved some configs in previous updates.  However, note that this code is currently still bare-bone.
Added "export to Excel" function.
Added "export to excel" functionality.
Made MiddleName optional in the residentiddefinition table
Fixed install merge issues and updated db struct
Merge pull request #13 from shadowdoc/update-install-to-match-dbstructure

Update install to match dbstructure
Merge pull request #12 from shadowdoc/middle-name-shouldnt-be-required

Made MiddleName optional in the residentiddefinition table