Minor cleanup of README.curl

Make the lines 80 characters long.  Add an apostrophe to
(2) Bindings to libcurl's curl_easy_setopt and curl_easy_perform
Minor edits to README.auxIO

Makes sure the lines are at most 80 columns long, removes a reference to the
non-existent README.lustre, and switches "no one" to "no individual" in the last
entry, as I believe it is clearer this way.  Everything else looks fine.
Merge pull request #489 from lydia-duncan/docFreezeAuxIO

Doc freeze aux io [reviewed by kyleb]

Cleans up README.curl and README.auxIO. Reformatted so lines are now 80
columns long. 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.