Add list view tests

Also,
 * moved fetch out of the list view
 * removed unused #last() function
 * put test setup lines in their own tiny file.
 * added data-cover to view script tags for code coveage reports.

test/views/list_view_test.js

@@ -0,0 +1,22 @@
+describe('ListView', function() {
+  var collection;
+
+  beforeEach(function(){
+    collection = new Backbone.Collection();
+  });
+
+  it('should add children to the list element as they are added to the collection', function() {
+    var view = new Whisper.ListView({collection: collection});
+    collection.add('hello');
+    assert.equal(view.$el.children().length, 1);
+    collection.add('world');
+    assert.equal(view.$el.children().length, 2);
+  });
+
+  it('should add all the children to the list element on reset', function() {
+    var view = new Whisper.ListView({collection: collection});
+    collection.reset(['goodbye', 'world']);
+    assert.equal(view.$el.children().length, 2);
+  });
+
+});