Fix stupid mistake in DI module.

nickkeep/src/com/dmdirc/addons/nickkeep/NickKeepModule.java

 /**
  * Dagger injection module for the Nick Keep plugin
  */
-@Module(injects = NickKeepModule.class, addsTo = ClientModule.class)
+@Module(injects = NickKeepManager.class, addsTo = ClientModule.class)
 public class NickKeepModule {}