refs #71 modified to edit ticket version
refs #73 modified detailed ticket page
refs #74 add paging of tickets
refs #75 'rails generate migration AddFinishedToStatuses finished:boolean'
refs #75 add to set finished status
refs #74 add tabs of finished and unfinish
Merge branch 'master' into develop
refs #72 delete files of function
refs #72 'rails generate scaffold ticket_category name'
refs #72 add function to add and edit category name
refs #72 add admin menu of the ticket category
refs #72 bug fix, add function to destroy the ticket category
refs #54 modified input text field -> select dropdown-list
refs #72 add to select  the ticket categories on the new and edit page
refs #72 'rails generate model ticket_category_case ticket_id:integer ticket_category_id:integer'
refs #72 create the ticket categories
refs #72 edit the ticket categories