Merge pull request #6 from Steve-Tredinnick/master

Fix for broken clean install
changed the assigned to area to use a table. not happy with it but it formats better with gravatars and names.
centered name to gravatar on Assigned To. Also removed gravatar from 'opened by' and 'last edited by' to make it cleaner.
made some fixes to gravatars on history pages and elsewhere
created a readme.md
Merge remote-tracking branch 'refs/remotes/upstream/master'