add tomcat jndi support. The Hibernate datasource and corresponding properties must be defined in the TOMCAT_HOME/conf/server.xml. All Hibernate jndi-env properties in TOMCAT_HOME/conf/server.xml must be referenced in src/main/webapp/META-INF/context.xml file otherwise they will be ignored.
Merge branch 'master' of github.com:rlentz/tahi_jndi