Add gradle wrapper (#4)

The gitignore was blocking gradle wrapper from getting added

.gitignore

@@ -2,6 +2,15 @@
 **/build/
 !src/**/build/
 
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
 # Ignore Gradle GUI config
 gradle-app.setting
 
@@ -36,15 +45,6 @@ gradle-app.setting
 
 run/
 
-# Package Files #
-*.jar
-*.war
-*.nar
-*.ear
-*.zip
-*.tar.gz
-*.rar
-
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 replay_pid*