Add missing dependencies (Trove, GSON) to build.gradle.

build.gradle

@@ -45,6 +45,8 @@ dependencies {
     compile group: 'com.sk89q', name: 'jchronic', version:'0.2.4a'
     compile group: 'com.google.code.findbugs', name: 'jsr305', version: '1.3.9'
     compile group: 'com.thoughtworks.paranamer', name: 'paranamer', version: '2.6'
+    compile group: 'com.google.code.gson', name: 'gson', version: '2.2.4'
+    compile group: 'net.sf.trove4j', name: 'trove4j', version: '3.0.3'
     testCompile group: 'org.mockito', name: 'mockito-core', version:'1.9.0-rc1'
 }