Fix table row format in documentation
Merge pull request #949 from bclozel/fixdoc

* fixdoc:
  Fix table row format in documentation
Support for explicit module path in dependency

Instead of *always* needing to pull auto-import dependencies
from the master parent pom, we now allow normal @Grab-style
module specifications, e.g. "io.ratpack:ratpack-groovy:0.9.2"
Extract closure grabber into AstUtils
Support for Ratpack script enhancement

@EnableRatpack is detected and triggers autoimports to
support ratpack {} DSL (handlers only, since modules are
not needed in a Spring application).
Re-order AST transformations

Now a script with *just* ratpack{} also works
(no need to explicitly @EnableRatpack)