Made overlay more distro independent.
Set conf default to debian, add some more metadata.

 - deploy script now assumes debian standard for web user
 - added size metadata to files
 - added website name and data to metadata
Try to get size added.
Update metadata with Peter's feedback.
Remove debug messages.

 - Sorry; left in by accident.
Fix URLs in oai repository.
Added some basic help.
Support adding help description in metadata.
Improve handling of invalid requests.

 - Just return to deposit page if browse to addmeta with invalid sub id.
Add linguistic language code typeahead.

 - Also fixed minor bug in deposit_handler (two returns in row)
Forgot to add lang_codes. Oops.
Reworked grouping and handling of form fields.

 - Now have "fieldsets" which contain basic and extra fields
Fix access bug.
Make from inputs a bit bigger.
Fix boolean value being lost on form reload.
Merged master branch