deathcap

Glowstone will also have to be updated to include the `com.google.code.findbugs:jsr305:2.0.1` dependency for [javax.annotation.Nullable](http://stackoverflow.com/questions/3800033/guava-r07-gwt-and-javax-annotation-nullable) (no longer included in Guava) if this is merged. No PR yet on Glowstone but I...

This change does definitely break plugins, written for 1.7 which rely on Guava 10. Would be interesting to determine the scale of this breakage, I think @md-5 has or had...