Display lint warnings.

Author: Capstan

build.gradle

@@ -55,6 +55,17 @@ task sourcesJar(type: Jar, dependsOn: classes) {
     from sourceSets.main.allSource;
 }
 
+/*
+ * Lint all the things!
+ */
+allprojects {
+    gradle.projectsEvaluated {
+        tasks.withType(JavaCompile) {
+            options.compilerArgs << "-Xlint:all"
+        }
+    }
+}
+
 /*
  * Javadoc: we need to tell where the overview.html is, it will not pick it up
  * automatically...