Upgrade Guava to version 18.

Author: silentmatt

lib/guava-12.0.1.jar

@@ -26,15 +26,15 @@ dist.jar=${dist.dir}/dss.jar
 dist.javadoc.dir=${dist.dir}/javadoc
 endorsed.classpath=
 excludes=
-file.reference.guava-12.0.1.jar=lib\\guava-12.0.1.jar
+file.reference.guava-18.0.jar=lib/guava-18.0.jar
 file.reference.JSAP-2.1.jar=lib/JSAP-2.1.jar
 includes=**
 jar.archive.disabled=${jnlp.enabled}
 jar.compress=false
 jar.index=${jnlp.enabled}
 javac.classpath=\
     ${file.reference.JSAP-2.1.jar}:\
-    ${file.reference.guava-12.0.1.jar}
+    ${file.reference.guava-18.0.jar}
 # Space-separated list of extra javac options
 javac.compilerargs=-Xlint:unchecked
 javac.deprecation=true