JENKINS-7824: Add a record of who assigned the build failure and display
it
JENKINS-7824: use spaces rather than tabs in jelly files modified to add
assigned by details
JENKINS-7824: Correct indentation for change to add assigned by field
JENKINS-7824: Add configurable emails to assignees when assigning a
failure
JENKINS-7824: Correct text for email help
JENKINS-7824: Allow users to drop claims assigned to them by other users
Merge branch 'master' of https://github.com/ninian/claim-plugin
Merge pull request #13 from ninian/master

JENKINS-7824: Add 'assigned by' field and optional emails