[#7480] ticket:610 Track login info
[#7480] ticket:610 Track last active session
[#7480] ticket:610 Add last_access field to scrub-allura-data script
[#7510] Script to prepare exported tickets for importing. Fixes for solr indexing.
[#7510] output top usernames, fixed milestone detection, updated custom_fields
[#7510] saved_bins bugfix, fixed milestone detection
[#7510] add license header and docstring to new script
[#7581] don't try to get commit sizes for log views of non-files

We don't show 'size' values for directory commit logs anyway, and svn
1.8 started returning -1 instead of 0 causing a test to fail.
[#7524] ticket:613 Site admin page for users audit log
[#7524] ticket:613 Track changes to user accounts
[#7524] ticket:613 Don't track activity if neither project or user are provided
[#7524] ticket:613 Add some tests for user account audit
[#7524] ticket:620 Add an index on audit_log.user_id
[#7524] ticket:620 Log password reset and account disabling
[#7524] ticket:620 Use autits helper in tests
[#7524] ticket:620 Change default audit log limit to 25