upgraded grails to 2.2.3
upgraded grails wrapper to 2.2.3
upgraded gradle to 1.6
upgraded gradle wrapper to 1.6
put socket operations together into SocketUtil at build.gradle
unified a message when invoking
formatted scripts
added functonal tests
fixed for deriving grails_base_dir at improxSmartInvoker.sh

An error of 'cd' command occurs when running functional test with a relative
path under project dir like 'test/functional/FooSpec.groovy.'
excluded 'web-app/**' not to include them even if they exist, for example, just after Grails' upgrade/init command
version 0.3
added license header