Version 0.9.1.
Prepare for 0.9.2.
update ratpack-gradle version in Lazybones templates
Health check JavaDoc
Add a default handler to run health checks #246
Add ratpack-heroku gradle plugin.

Closes #247.
Break out the functional types into their own package.
Doc fixes after class move.
More Lazybones manual content
Merge branch 'master' of github.com:ratpack/ratpack
Set executable permision on generated heroku buildpack files.

Related to #247
Merge remote-tracking branch 'origin/master'
Simplify how chains are built.
Mark the lazybones examples as bash.
Minor tweaks to Lazybones docs.