#166 Patch 292 Customer can view own invoices and details
https://github.com/apmuthu/simpleinvoices/commit/ac01b06d4d2d4236c0903335d0e69ca3b95ca3af
https://github.com/apmuthu/simpleinvoices/commit/ffbcac43dad0f0aa1d87bdd856869defb73ab29e