Issue #117 Added Stats interface, Host.stats() method,
DefaultHost.stats() implementation
Issue #117 Added XML element for domain Cloudwatch stats
directory.xsl
Issue #117 Dummy stats when AWS key is invalid for build test purposes
Issue #117 Checkstyle fixes
Merge pull request #131 from carlosmiranda/117

#131: pull request Issue #117 Displaying CloudWatch stats as XML elements
#134: fixed