Added GenericXMLDataBinding and EchoProcess
Bugfixes
Replaced use of SimpleBufferAlgorithm with...

... EchoProcess.
Started using EchoProcess also for ExecutePostIT
Increased maxOccurs of inputs
Changed some more tests to use EchoProcess
merged branch 'echo-process-tests'
Switched more tests to GeoTools free processes

Also added a base64 encoded tiff as sample input data.
Integration tests can now be executed without...

... the with-geotools profile. WPS-T,- Axis- and FeedServlet had to be
removed from the web.xml.