Merge pull request select2#1236 from leighhalliday/master

Changing from ' to &select2#39; because ' isn't html standard and doesn't work in IE8

Author: ivaynberg

select2.js

@@ -2868,7 +2868,7 @@ the specific language governing permissions and limitations under the Apache Lic
                 '<': '&lt;',
                 '>': '&gt;',
                 '"': '&quot;',
-                "'": '&apos;',
+                "'": '&#39;',
                 "/": '&#47;'
             };