Add missing READMEs to list of READMEs.

We were missing references to README.knc, README.curl, README.auxIO
Merge branch 'master' into docFreezeReleaseREADME
Hadn't seen that README.knc had moved.  Updating its location.
Make Knights Corner description match the style of the others
Merge pull request #480 from lydia-duncan/docFreezeReleaseREADME

Add missing READMEs to list of READMEs [reviewed by Sung and Brad]

We were missing references to README.knc, README.curl, README.auxIO