Introduce Gradle-based build

- Use recent Gradle 1.0-milestone-8 snapshot
 - Add initial cut of build.gradle able to compile/test all modules
 - Update .gitignore
 - Generate Gradle wrapper scripts
 - Remove all Eclipse metadata files
 - Temporarily @Ignore tests that do not pass under Gradle

org.springframework.test/pom.xml

@@ -157,7 +157,18 @@
       <classifier>jdk15</classifier>
       <optional>true</optional>
     </dependency>
-
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-jcl</artifactId>
+      <version>1.5.3</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>cglib</groupId>
+      <artifactId>cglib-nodep</artifactId>
+      <version>2.2</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
 </project>