8ac1bbb1069ef36fca3bdf3eb2561cff47d4c5a1 Dev: Fix - missing a few ext…

…end parameters and incorrect extension for html5 button types

Sync to source repo @8ac1bbb1069ef36fca3bdf3eb2561cff47d4c5a1

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/Buttons",
     "last-tag": "3.1.1",
-    "last-sync": "d010691ef515cd56cb2cca27f001734ebb3af005"
+    "last-sync": "8ac1bbb1069ef36fca3bdf3eb2561cff47d4c5a1"
 }