Add README and other documentation

darcs-hash:20070303101645-4fc50-2641e57f88630ebf272b2d6d6daebdb3461a37f3.gz
An example of how to use Rack::Auth::Basic. Protect your lobsters!

darcs-hash:20070403205605-5d7f7-f97e4926fe57056d7be65c001391978ce26dd542.gz
Let Rack::Builder#use accept blocks

Contributed by Corey Jewett.

darcs-hash:20080224175153-4fc50-92205606f938818e1a6e4e8d702ef3083f5e0c5a.gz
Allow realm to be passed to auth handler's initialize method

Signed-off-by: Ryan Tomayko <rtomayko@gmail.com>
Update Lobster example
add sca

git-subtree-dir: source/sca
git-subtree-mainline: b0d5cd2690b92ea0d000a1a740cda24940ba60be
git-subtree-split: 9646d07db320dac623d2bc02e07df2c34e997d36