Thanks for the heads up.
Now that you mention it, I remember that hamcrest has it own jar file in many projects.

I checked the build path of the project in eclipse.
All libraries used are in the project.

Further more, I went to junit 4.11 javadocs (unfortunately didn't find 4.6 javadocs), and found hamcrest matchers there: http://junit.org/javadoc/latest/