Converted to Docbook for 5.2. Removed old documents (16 bit, AT, old
README). Fixed DOCTYPE, dead links and entities. Merged some documents
into userman and devman.

Released as Etherboot-doc 5.2.0

+ More fixes, added to acknowledgements.

+ Fixed CSS problem for <ul> items. Thanks to Timothy Legge.

+ Broken link in mailinglist.html fixed. Spotted by Timothy Legge.

+ Add missing acknowledgements.

+ Make Wiki top level link from LHS menu.

Released as Etherboot-doc 5.2.2