"deprecation" notice [noci]

0.3.0 changelog, readme tweaks

0.3.0-SNAPSHOT

eliminate "classic" OpenId workflow, gh-45

remove deprecated `requires-scheme*` middlewares,

replace `original-url` with `ring.util.request/request-url`, fixes gh-154

0.2.3

deprecate and un-document "channel security" stuff, pointing to ring-ssl (via ring-defaults for most)

0.2.2

Merge pull request #144 from timothypratley/master

preserve forwarded host name

Merge pull request #141 from MichaelBlume/fix-one-term

fix one more one-term =

actually check something in all of the functional test assertions, fixes gh-140

botched conflict resolution