[svn] * README: Changed 1.5.3 in the FTP URL to 1.6.

[svn] * README: Changed 1.5.3 in the FTP URL to 1.6.

* NEWS: Released Wget version 1.6.

* po/*.po: 'Project-Id-Version's were very haphazard, saying
either "wget" or "GNU wget", and with versions of 1.5.2-b[124], 1.5.3, the
nonexistent 1.5.4, and 1.6-pre.  Standardized all to "GNU Wget 1.7-dev".
Perhaps this is wrong to do because some of the translations haven't been
updated since the versions they state, but I know some of the files were updated
specifically for 1.6, and none of them used this version.  In any case, the
'POT-Creation-Date's and 'PO-Revision-Date's remain the best indicator of
whether a translation's out of date.