Merge pull request #176 from jasvir99/dirty

tinymce added so that user can have custom headers of bills.
Merge pull request #177 from jasvir99/dirty

adding filters and search fields.
Merge pull request #178 from jasvir99/dirty

removing previously registered category.
Merge pull request #179 from jasvir99/dirty

now user can save generated regiter.
Update list_products.html
Staff members assigned dynamically to vouchers
Merge pull request #180 from JaskaranSingh/dirty

Staff members assigned dynamically to vouchers