Modifications Part 1

*Included View Tenant - Dyan narin ieedit.
*Added Email Reg. Expression Validator sa RegTenant.aspx
*Yung Default Pic ng Friendster will appear at ViewTenant.aspx if no
photo is uploaded
*Updated Usermanagement - Added checkUser which checks if username
exists in 2(3 na pag may guardians table) tables.

-ENJOY. I'll continue later.-