Fixes #18.

[dustindclark]

This fixes #18 by allowing a plugin to override the default templates provided by the Scaffolding plugin. The plugin that contains the template overrides should be configured to load AFTER the scaffolding plugin. An example implementation follows:

Closure doWithSpring() { { ->
         jspViewResolver(ScaffoldingViewResolver, this.class) { bean ->
             bean.lazyInit = true
             bean.parent = "abstractViewResolver"
         }
}}