Merge pull request #19 from netputer/master

Update
Merge pull request #20 from netputer/master

Use HTTP API in IE
Merge pull request #21 from netputer/master

Update fallback url
Merge pull request #22 from netputer/master

Extend error message
Merge pull request #23 from netputer/master

Popup page when callback is function
Merge branch 'root/master'