Update Gradle wrapper to 2.14.1

- Update Gradle plugin publish plugin
- Update licenser
- Remove generate anonymous inner class mapping task. Fixes #5

build.gradle

@@ -6,9 +6,9 @@ plugins {
     id 'idea'
 
     id 'maven'
-    id 'com.gradle.plugin-publish' version '0.9.4'
+    id 'com.gradle.plugin-publish' version '0.9.5'
 
-    id 'net.minecrell.licenser' version '0.1.5'
+    id 'net.minecrell.licenser' version '0.2.1'
 }
 
 defaultTasks 'clean', 'licenseFormat', 'build'
@@ -135,5 +135,5 @@ uploadArchives {
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '2.13'
+    gradleVersion = '2.14.1'
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Mon May 09 17:44:39 CEST 2016
+#Wed Aug 24 17:34:53 CEST 2016
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-bin.zip

src/main/groovy/org/spongepowered/gradle/SpongeGradlePlugin.groovy

@@ -26,7 +26,6 @@ package org.spongepowered.gradle
 
 import org.gradle.api.Plugin
 import org.gradle.api.Project
-import org.spongepowered.gradle.task.TaskGenerateAnonInnerClassMappings
 import org.spongepowered.gradle.task.TaskSortAccessTransformers
 import org.spongepowered.gradle.task.TaskSortClassMembers
 
@@ -44,9 +43,6 @@ class SpongeGradlePlugin implements Plugin<Project> {
             group = "Sponge"
             description = "Sort entries in AccessTransformer configurations"
         }
-
-        // TODO: There is probably a better way to prevent the import in the build.gradle
-        project.ext.GenerateAnonInnerClassMappings = TaskGenerateAnonInnerClassMappings.class
     }
 
 }