Updated TODO.
Added message to XPath step in XSD.
Extend builder XSL to add XPath error message.
Enabled state to accept XPath message, and allow handler to set it.
Add flag to enable rax-message extension.
Added message option to CLI utils.
Fixed minor misspelling.
Updated TODO.
XPath join optimization is now aware of message extension.
Added XPATH state tests for rax message extension.
Error message should always be used in element check -- even if rax:message is disabled.
Check message attribute in WADLCheckerSpec for element paths.
Added builder tests for rax:message extension.
Added validator tests to check xpath messages, and the rax:message extension
Merge pull request #103 from InABlender/raxMessage

rax:message extension