ACTIVEMQ6-4 - rename all config files

https://issues.apache.org/jira/browse/ACTIVEMQ6-4

rename all the config files to activemq and fix schema names in them
Merging rename all config files #15
ACTIVEMQ6-10 Remove JBoss 4 integration
ACTIVEMQ6-9 Clean up docs
ACTIVEMQ6-39 Rename HornetQ* classes to ActiveMQ*