Converting to Gradle and removing Grails for plain Spring use

Moving src/java to src/main/java to match default Gradle build script
Removing all Grails specific files
Removing ICUPluginAwareResourceBundleMessageSource.java
Including copies of grails.util.CacheEntry and grails.util.Pair locally
Updating README examples

Upgraded to version 0.1.1

Merge pull request meticoeus#1 from burtbeckwith/master

cleanup