ACTIVEMQ6-1 - Initial HornetQ Donation Commit

https://issues.apache.org/jira/browse/ACTIVEMQ6-1

This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
ACTIVEMQ6-2 Update to HQ master
ACTIVEMQ6-18 Update README for new code workflow

Updates the README to reflect the new code contribution workflow.
ACTIVEMQ6-4 - Rename packages to ActiveMQ

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

Repackage the modules, java source and maven poms to apache.activemq6
Use new package names in config and classes
Remove HornetQ references from README
Merge branch 'pr/7' from Martyn including README changes
ACTIVEMQ6-3 renaming directories from activemq6 to activemq

https://issues.apache.org/jira/browse/ACTIVEMQ6-3

We are renaming packages from activemq6 to activemq as that's more generic and version independent
On this first commit I'm just renaming the directories otherwise the history would be lost. The next commit will rename the text on the directories.
If I squash these two commits git will make us delete / add again.
ACTIVEMQ6-3 renaming package names from activemq6 to activemq

https://issues.apache.org/jira/browse/ACTIVEMQ6-3

We are renaming packages from activemq6 to activemq as that's more generic and version independent
The previous commit renamed the directories. On this commit now I'm changing the code.
If we changed the code and the directories on the same commit git would remove and add a lot of files
without recognizing the renames.
merge PR #9 Renaming packages
Updated README to reflect new git work flow
Merging #10 from Martyn on the Readme updates
ACTIVEMQ6-3 Restoring directories removed by accident on previous commit

https://issues.apache.org/jira/browse/ACTIVEMQ6-3

These directories were removed by accident... restoring them now
Merge #11