Merge pull request #11 from StrataLabs/root_cause

For QC story.
SDPIII-83 changes in link view
SDPIII-80 adding seed data for ticket link types
SDPIII-81 making position column not nullable
SDPIII-84 changing the link color for attachments
SDPIII-82 changes to display escalation hierarchy in department-locations
SDPIII-55, updated admin side view
Merge branch 'master' into root_cause