Update the default version of springloaded to 1.1.3

Matches the version used in Grails 2.2.3
Fixes test failure:
[main] ERROR agent.SpringLoadedPreProcessor  - Unexpected problem transforming call sites
during 'can create grails 2.0.0 project'
Add project property to toggle debug support

Enable debug by setting the project property 'grailsDebug' to 'true'

e.g.

This commit references #23
Merge pull request #39 from cfieber/feature/grails-debug

Add project property to toggle debug support
Merge pull request #37 from cfieber/bugfix/update-default-springloaded

Update the default version of springloaded to 1.1.3