Major Description
EAR descriptor must be generated under target as anything generated by buildr.
update_classpath method was modifying inherited manifest, thus causing EAR packages to contain Class-Path entries themselves, according to the specs ear packages may not have a Class-Path on their manifest.
Improvements on EAR package DSL, also fixed Class-Path generated entries according to the Jar specification at http://java.sun.com/j2se/1.4.2/docs/guide/jar/jar.html