Bootstrap with version 2.2.0

Bootstrapped JastAdd with JastAdd 2.2.0 to fix bitbucket issue #255.

fixes #255 (bitbucket)

ChangeLog

+2016-02-02  Jesper Öqvist <jesper.oqvist@cs.lth.se>
+
+    * Fixed repeated error message reported for multiple production rules for
+    a single nonterminal in the abstract grammar.
+
 2016-01-17  Jesper Öqvist <jesper.oqvist@cs.lth.se>
 
     * Added generated methods ASTNode.astChildren() and

build.gradle

@@ -76,7 +76,7 @@ repositories {
 
 dependencies {
 	compile 'org.apache.ant:ant:1.9.4'
-	jastadd('org.jastadd:jastadd:2.1.13') { force = true /* Avoid conflict with local artifact. */ }
+	jastadd('org.jastadd:jastadd:2.2.0') { force = true /* Avoid conflict with local artifact. */ }
 	javacc 'net.java.dev.javacc:javacc:4.0'
 }