remove the is_staff requirement to be able to do bug association;

Also the author of a bug association is always taken from the user
credentials and not from the data POSTED as it used to be
Merge pull request #183 from mozilla/bug-1042695-treeherder-tbpl-sync

remove the is_staff requirement to be able to do bug association
add repository full info to resultset endpoint
clear cache when data sources are updated
doc update to remove restart memcache step from updating datasources
small doc update
Merge branch 'and-more-revisions' of github.com:mozilla/treeherder-service into and-more-revisions