added ticke transition model
updated the migration
code to update old records for ticket transition
SDPIII, for data migration
added code for new ticket transitions
SDPIII-78, added computed report model and in active admin
SDPIII-78, added validation to computed report model, added namespaced tat report model
SDPIII-78, added code to get tickets for tat report
SDPIII-78, added code for generating csv
added code for finding rows for csv field
SDPIII-78, added page to show all reports
SDPIII-86, has set the earlier commits with wrong tag, views for generating report
SDPIII-86, added correct file name for csv
SDPIII-51, added by last_action_by column and code to ticket transitions
SDPIII-51, added code for TAT report
SDPIII-51, added common code to computed reports branch, more code to be added
later
SPDIII-91 Base report added
added ticke transition model
updated the migration
code to update old records for ticket transition