2013-12-5: Version 5
* Move change logs and version information out of individual files and into a central change log

* Remove lots of depreciated HTML4 stuff in the Web GUI

* Use divs and CSS to position and size the tables in the Web GUI

* Remove the summary table of head nodes in the Web GUI

* Add a detail table for the head nodes in the Web GUI

* Switch the head nodes' DB collection name to "head"

* Change "primary_of" and "secondary_of" details of head node to a list if ints

* Add journal feature to the head nodes

* Removed zombie checker feature