should be able to update people info

create form to update people info ([reference](https://github.com/developers-nepal/ktmjs/blob/master/site-admin/templates/admin/update.hbs]))
[add routes for updating people](https://github.com/developers-nepal/ktmjs/blob/master/site-admin/routes/people.js)
[button to update people info](https://github.com/developers-nepal/ktmjs/blob/master/site-admin/routes/people.js])
