feat(signaling): add alias for t-params

 foreach attribute registered, add the corresponding *-params attribute as well

 fixes issue #41

README.md

@@ -318,6 +318,7 @@ This will be picked up by the CLI when translations are extracted from the sourc
 
 #### Passing parameters to the attribute
 In order to use parameters for replaceable parts in your translation key, you can provide an additional `t-params` attribute and bind it to the object containing the replacement values.
+Also note that for whatever attribute you registered, the corresponding \*-params attribute will get registered as well automatically.
 
 ```javascript
 // Translation file
@@ -328,7 +329,7 @@ In order to use parameters for replaceable parts in your translation key, you ca
 
 ```markup
 <!-- View -->
-<span t.="[html]paramstest" t-params.bind="params"></span>
+<span t="[html]paramstest" t-params.bind="params"></span>
 ```
 
 ```javascript

src/aurelia-i18n.js

@@ -42,6 +42,7 @@ function configure(frameworkConfig, cb) {
     }
 
     attributes.forEach(alias => resources.registerAttribute(alias, htmlBehaviorResource, 't'));
+    attributes.forEach(alias => resources.registerAttribute(alias + '-params', htmlParamsResource, 't-params'));
   });
 
   return ret;

test/unit/i18n-attribute.spec.js

@@ -19,13 +19,13 @@ describe('testing i18n attributes', () => {
     sut = new I18N(new EventAggregator(), new DefaultLoader(), new BindingSignaler());
     sut.setup({
       resStore: {},
-      lng : 'en',
-      getAsync : false,
-      sendMissing : false,
-      fallbackLng : 'en',
-      debug : false
+      lng: 'en',
+      getAsync: false,
+      sendMissing: false,
+      fallbackLng: 'en',
+      debug: false
     });
-    
+
     container = new Container();
     container.registerInstance(I18N, sut);
     container.registerInstance(DOM.Element, DOM.createElement('div'));