add back filterFiles with deprecation warning

Issue #66
Fix exception from out of date ratpack template

The previous script throws an exception when trying to run the Ratpack application.

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
ratpack.groovy: 1: unable to resolve class org.ratpackframework.groovy.templating.TemplateRenderer
 @ line 1, column 1.
   import org.ratpackframework.groovy.templating.TemplateRenderer
   ^

1 error

	at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:309)
Merge pull request #72 from tomaslin/patch-1

Fix exception from out of date ratpack template
Start of sandbox for post-install scripts.
Add a log message at start of create command.

Although a seemingly small change, this ended up being a small to medium
refactor.
Parameterise Groovy version in build and upgrade to 2.1.5.
Fix minor typo in comment.
Fix handling of empty user config file.

Lazybones was assuming that if a config file existed, it specified the list of
Bintray repositories to search for templates. This wasn't the case and most of
the commands errored out due to there being no repositories configured.

Lazybones now sets a default repository list if the user hasn't set one him- or
herself, regardless of whether the config file exists or not.
Add Luke and Tomas as contributors.
change warning to target user
Public directory should be available as a handler

Right now, the template doesn't have assets "public". But this should really be in there since files in the public directory are not visible in the web app.
Merge pull request #73 from tomaslin/patch-2

Public directory should be available as a handler
Bump Ratpack template version to 0.3.
Update ratpack-lite template for latest Ratpack version.
Bump ratpack-lite version to 0.2.
Bump ratpack template version to 0.3.1.
Merge pull request #71 from tbarker9/deprecate-filter-files

add back filterFiles with deprecation warning