encapsulate dom4j in org.jboss.tools.hibernate.dom4j and update dependencies
move back dependency on org.hibernate.eclipse.libs for now to avoid failing tests
remove uses of org.hibernate.MappingException, simplify ReflectHelper
remove occurrences of org.hibernate.HibernateException
remove unused class ProxyFactory
eliminate use of ArrayHelper by inlining toIntArray() into StringHelper
inline StringUtils.equals() method
copy XMLHElper and DTDEntityResolver and use it in ConfigurationFactory
inline ConfigHelper.getResourceAsStream()
org.hibernate.eclipse depends on org.apache.log4j, org.apache.commons.logging and org.slf4j.api
org.hibernate.eclipse is now independent of org.hibernate.eclipse.libs