Switched to WPS version 3.2.0

Also changed the GMLParser in the test to GML2BasicParser, as the GML
file seems to be GML2.
Removed unused import
Added new process, updated parent version

Added a JTSBufferProcess that can be added to the WPS using the
ServiceLoaderAlgorithmRepository, switched to current parent version.
Updated readme

Fixed typo and added information about automatically adding processes to
the WPS.
Merge pull request #1 from bpross-52n/master

Switched to WPS version 3.2.0