Doc freeze aux io

Cleans up README.curl and README.auxIO.  This diff will not be easy to read.
Most of the diff is a result of forcing the lines to be 80 columns long, but there
are one or two other changes.  Specifically, added an apostrophe to a single
line in README.curl in reference to libcurl's ownership, removed a reference to the
non-existent README.lustre, and switched "no one" to "no individual" in the last
entry, as I believe it is clearer this way.