Replaced the potentially ambiguous copyright notice with the full root
copyright notice (although we don't actually bother to have any in
most of the files).

When MRC open-sourced the software they sent me the original
(LICENCE.txt) copyright notice for it to be applied to all the
software.  Any internal MRC specific copyrights left in place are an
accidental and  superceded.


git-svn-id: svn://svn.code.sf.net/p/staden/code/staden@3639 ba6f2710-ca9f-427c-89d3-5bf716dbc8e1