Remove vivus word from the ignore tag

Update the documentation to mention the ignore tag.

readme.md

@@ -161,6 +161,20 @@ new Vivus('my-svg-id', {
 
 **WARNING**: `animTimingFunction` is called at every frame of the animation, and `pathTimingFunction` is also called at every frame for each path of your SVG. So be careful about them. Keep it simple, or it can affect the performances.
 
+## Extra attributes
+
+The attribute `data-ignore` allow to ignore path tags from the vivus animation.
+
+```html
+<svg id="my-svg">
+  <path...>
+  <path data-ignore="true" ...>
+  <path...>
+</svg>
+```
+
+In this case, the second path won't be part of the animation.
+
 ## Scenarize
 
 This feature allows you to script the animation of your SVG. For this, the custom values will be set directly in the DOM of the SVG.
@@ -264,4 +278,4 @@ var logo = new Vivus('myLogo', {type: 'scenario-sync'});
 
 // The property 'map' contain all the SVG mapping
 console.table(logo.map);
-```
+```

src/vivus.js

@@ -596,7 +596,7 @@ Vivus.prototype.destroy = function () {
  */
 Vivus.prototype.isInvisible = function (el) {
   var rect,
-    ignoreAttr = el.getAttribute('data-vivus-ignore');
+    ignoreAttr = el.getAttribute('data-ignore');
 
   if (ignoreAttr !== null) {
     return ignoreAttr !== 'false';

test/unit/vivus.spec.js

@@ -326,18 +326,18 @@ describe('Vivus', function () {
       });
 
       it('should not accept a path which with an ignore tag', function () {
-        svgTag.childNodes[1].setAttribute('data-vivus-ignore', 'true');
+        svgTag.childNodes[1].setAttribute('data-ignore', 'true');
         myVivus = new Vivus(svgTag);
         expect(myVivus.map.length).toEqual(5);
       });
 
       it('should not accept a path which is not displayed', function () {
-        svgTag.childNodes[1].setAttribute('data-vivus-ignore', 'false')
+        svgTag.childNodes[1].setAttribute('data-ignore', 'false')
         myVivus = new Vivus(svgTag);
         expect(myVivus.map.length).toEqual(6);
       });
     });
-    
+
     // Drawing
     describe('Drawing:', function () {