Added references ; tuned README.

Author Pascal J. Bourguignon <pjb@informatimago.com>
Author date 2013-10-20 15:15:57
Author local date 2013-10-20 17:15:57 +0200
Committer Pascal J. Bourguignon <pjb@informatimago.com>
Committer date 2013-10-20 15:15:57
Committer local date 2013-10-20 17:15:57 +0200
Commit 9a00fa5632e63e0edc1f43c1f66cef22cde09091
Tree ecd5c1c1daf7e5e3509789f6344e91006c3dc405
Parent 2c4e5228cc0dae14e16b396431e3e4ba1555f737
Added references ; tuned README.
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