Add findbugs.

Change-Id: If96ce40a9e3afaf07858eec6ee17fc384715d240
Reviewed-on: http://gerrit.dmdirc.com/3947
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

build.gradle

@@ -4,6 +4,7 @@ import org.mdonoughe.JGitDescribeTask
 
 subprojects {
     apply plugin: 'java'
+    apply plugin: 'findbugs'
     apply plugin: 'pmd'
 
     configurations {
@@ -79,6 +80,19 @@ subprojects {
         ruleSetFiles = files("$rootDir/etc/pmd/full.xml")
     }
 
+    tasks.withType(FindBugs) {
+        reports {
+            html.enabled = true
+            xml.enabled = false
+        }
+    }
+
+    findbugs {
+        reportLevel = 'low'
+        effort = 'max'
+        ignoreFailures = true
+    }
+
     jar {
         from("$buildDir/plugin.config") {
             into 'META-INF'

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sun Sep 14 12:37:42 BST 2014
+#Tue Sep 16 15:02:24 BST 2014
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.1-bin.zip