Scaffold stylesheet css.
File bill controller.
File bill helper.
File bill model.
Bills' views.
Route for bill.
File migration for bill.
Deleted default index.html file.
Controller file for document.
Helper file for document.
Model file for document.
Views's files for documents.
Migration file for document.
Routes file.
Added validation to model bill.
Added validation to model client.
Added validation to model cpa.
Added validation to model document.