Better api generation

Things to consider:

• breaking changes (removed imports), so up minor version, because we are still not in 1.0

src/main/jastadd/backend/AbstractGrammar.jadd

@@ -23,47 +23,6 @@ aspect BackendAbstractGrammar {
     }
   }
 
-  public void TypeDecl.generateUnresolvedClass(StringBuilder sb) {
-    if (getAbstract()) {
-      sb.append(ind(1) + "abstract ");
-    } else {
-      sb.append(ind(1));
-    }
-    sb.append("class " + unresolvedPrefix + getID() + " extends " + getID() + "  implements " + unresolvedPrefix + "Node {\n");
-
-    sb.append(ind(2) + "private String unresolved$Token;\n");
-    sb.append(ind(2) + "public String get" + unresolvedPrefix + "Token() {\n");
-    sb.append(ind(3) + "return unresolved$Token;\n");
-    sb.append(ind(2) + "}\n");
-    sb.append(ind(2) + "void set" + unresolvedPrefix + "Token(String token) {\n");
-    sb.append(ind(3) + "this.unresolved$Token = token;\n");
-    sb.append(ind(2) + "}\n");
-
-    sb.append(ind(2) + "private boolean unresolved$ResolveOpposite;\n");
-    sb.append(ind(2) + "public boolean get" + unresolvedPrefix + "ResolveOpposite() {\n");
-    sb.append(ind(3) + "return unresolved$ResolveOpposite;\n");
-    sb.append(ind(2) + "}\n");
-    sb.append(ind(2) + "void set" + unresolvedPrefix + "ResolveOpposite(boolean resolveOpposite) {\n");
-    sb.append(ind(3) + "this.unresolved$ResolveOpposite = resolveOpposite;\n");
-    sb.append(ind(2) + "}\n");
-
-    sb.append(ind(1) + "}\n");
-
-    sb.append(ind(1) + unresolvedPrefix + "Node " + getID() + "." + asUnresolvedMethod + "() {\n");
-    sb.append(ind(2) + "return null;\n");
-    sb.append(ind(1) + "}\n");
-    sb.append(ind(1) + unresolvedPrefix + "Node " + unresolvedPrefix + getID() + "." + asUnresolvedMethod + "() {\n");
-    sb.append(ind(2) + "return this;\n");
-    sb.append(ind(1) + "}\n");
-
-    sb.append(ind(1) + "boolean " + getID() + "." + isUnresolvedMethod + "() {\n");
-    sb.append(ind(2) + "return false;\n");
-    sb.append(ind(1) + "}\n");
-    sb.append(ind(1) + "boolean " + unresolvedPrefix + getID() + "." + isUnresolvedMethod + "() {\n");
-    sb.append(ind(2) + "return true;\n");
-    sb.append(ind(1) + "}\n");
-  }
-
   public void TypeDecl.generateAbstractGrammar(StringBuilder sb) {
     if (getAbstract()) {
       sb.append("abstract ");