Start using SoapUI 4.6.4 #106
Upgrade commons-lang to 3.3.1 #111
Use current version instead of hard coded one
Add a test that shows the issue #85
Test showing a fix by adding a missing dep #85
Implement a fix for #85

This is a workaround as the bug comes from the soapui-pro jar. I add a
required dependencies directly to the plugin
Merge branch 'bug-85-message-content-assertion' into task-106-soapui-4.6.4-support
Merge branch 'task-106-soapui-4.6.4-support'