Including gradle wrapper jar to allow compiling from outdated gradle versions

Author: gianluz

.gitignore

@@ -40,6 +40,8 @@ fabric.properties
 
 # Package Files #
 *.jar
+!gradle/wrapper/gradle-wrapper.jar
+
 *.war
 *.nar
 *.ear
@@ -52,4 +54,3 @@ hs_err_pid*
 
 # Danger Temporary Files #
 danger_out.json
-