Effect annotations print with fully qualified name

[lrytz]

It would be nice to omit the ubiquitous scala.annotation.effects:

tsf-444-wpa-2-149:scala-2.10 luc$ ~/scala/scala-2.10.1/bin/scala -cp effects-plugin_2.10-0.1-SNAPSHOT.jar -Xplugin:effects-plugin_2.10-0.1-SNAPSHOT.jar -P:effects:domains:io

Welcome to Scala version 2.10.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_45).
Type in expressions to have them evaluated.
Type :help for more information.

scala> def f: Int @io = 1
f: Int @scala.annotation.effects.io