supervised.ims-gpl depends on obsolete repository

[logological]

The POM for the supervised.ims-gpl module refers to a ClearTK Google Code repository which may (soon) no longer exist. This should be updated.

[logological]

The repository is now gone and I can't find any other repository that has the same versions of the artifacts we were using. These were in particular:

		<dependency>
			<groupId>opennlp</groupId>
			<artifactId>maxent</artifactId>
			<version>2.5.1</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>opennlp</groupId>
			<artifactId>tools</artifactId>
			<version>1.3.0</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>

Maven Central has much more recent versions of these artifacts, though the APIs have changed and it's not trivial to update our code.

I think it will be necessary to disable the IMS module (and remove references to it) unless and until someone wants to upgrade our code.