Test for value injection using attribute XPath
Submission option messageOnHttpError

This includes connection timeouts.
Fixes #19
Submission option messageOnHttpError

Now realy does include connection timeouts!
Fixes #19
Fixes #20 - Flow def property injection bug.
Merge branch 'develop' of https://github.com/kaicode/rhinoforms into develop

Conflicts:
	src/main/java/com/rhinoforms/flow/RemoteSubmissionHelper.java
	src/main/java/com/rhinoforms/flow/Submission.java
	src/test/resources/test-flow1.js