Merge pull request #164 from tcrossland/master

getWidget() should not fail if constrained property is null
fix(scaffold property): since the scaffold property is a map, it makes sense to have the "exclude" property checked before using it, thus avoiding some NPE
Merge pull request #165 from deigote/scaffold-exclude-optional

fix(scaffold property): exclude is optional
Revert "fix(scaffold property): exclude is optional"
Merge pull request #166 from grails-fields-plugin/revert-165-scaffold-exclude-optional

Revert "fix(scaffold property): exclude is optional"
Use Grails 2.4.4, fix dependencies for functional tests in scaffolding-2.3 project