Add entity relation
Add relation interfaces
Add issue relation parser
Create IssueRelation to db
Fetch relations on IssueView
Output log on debug only
Fetch relations
Set header about issue detail
Fix layout
Fix issue primary key from integer to long
Fix fetch item relative issues
Relation data comes following even if current issue is 2.
<relation issue_id="1" issue_to_id="2">
Add adapter for show relative issues
Delete not exists relation on fetch remote
Refactor fetch issue_id over layers
Fix set priority
Layout margin
Support click event
Add menu record time
Fix set sum of time entries
Merge branch 'relations' into development