Add variables for java ee url and grails api docs url

Author: jameskleeh

grails-docs/src/main/groovy/grails/doc/DocPublisher.groovy

@@ -309,7 +309,8 @@ class DocPublisher {
         if(engine instanceof AsciiDocEngine) {
             // pass attributes to asciidoc
             ((AsciiDocEngine)engine).attributes.putAll(
-                    version: version
+                    version: version,
+                    apiDocs: "http://docs.grails.org/${version}/api/"
             )
         }
 

grails-docs/src/main/groovy/grails/doc/asciidoc/AsciiDocEngine.groovy

@@ -17,7 +17,8 @@ class AsciiDocEngine extends DocEngine {
     Map attributes = [
         'imagesdir': '../img',
         'source-highlighter':'coderay',
-        'icons':'font'
+        'icons':'font',
+        'javaee': 'https://docs.oracle.com/javaee/7/api/'
     ]
     @Override
     String render(String content, RenderContext context) {