Fixed .sbt configuration in README.md
Merge pull request #7 from tototoshi/patch-1

Fixed .sbt configuration in README.md
readme
site plugin
doc update
readme
cross build against scala 2.10.0-RC1
cross build against 2.10.0-RC2
cross build against Scala 2.10.0-RC5
Fix example output

"The above generates the following usage text:" was wrong.
I ran the example code and replaced the text in the readme
with the actual output.
Merge pull request #12 from chris-martin/master

Fix example code output in readme