added custom logback configuration
removing log4j config files - logback is used instead at runtime
enhancements for loading groovy scripts over S3
performance improvements for loading and caching groovy scripts
added ability to recompile groovy classes immediately after a filesystem change
remove overhead of storing unnecessary gwt-unitCache files
re-enabled Refresher widget; simplified vaadin widget compilation time
Any failure with WatchDir will now not prevent the app from starting