Upgrade to GWT 1.6.4 and Java 1.6

Signed-off-by: Shawn O. Pearce <sop@google.com>
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index 059dd5a..b0b2fe2 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -1,15 +1,15 @@
-#Fri Nov 14 18:42:47 PST 2008
+#Wed May 13 08:49:53 PDT 2009
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.compliance=1.6
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
-org.eclipse.jdt.core.compiler.source=1.5
+org.eclipse.jdt.core.compiler.source=1.6
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant=16
diff --git a/pom.xml b/pom.xml
index d881b9a..c2336ae 100644
--- a/pom.xml
+++ b/pom.xml
@@ -253,7 +253,7 @@
   </licenses>
 
   <properties>
-    <gwtVersion>1.5.3</gwtVersion>
+    <gwtVersion>1.6.4</gwtVersion>
   </properties>
 
   <build>
@@ -262,8 +262,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>1.6</source>
+          <target>1.6</target>
           <encoding>UTF-8</encoding>
         </configuration>
       </plugin>
@@ -357,13 +357,6 @@
     </repository>
   </repositories>
 
-  <pluginRepositories>
-    <pluginRepository>
-      <id>gwt-maven-plugins</id>
-      <url>http://gwt-maven.googlecode.com/svn/trunk/mavenrepo/</url>
-    </pluginRepository>
-  </pluginRepositories>
-
   <distributionManagement>
     <repository>
       <id>gerrit-maven-repository</id>