Final SilverStripe 4 Stable release

Fixed up for Vendorizing. Works with SS4

SilverStripe 4 release

Merge pull request #10 from Firesphere/ss4

Ss4

SS4 Beta release

Minor code updates to support the changes done in SS4 Beta-1

This is the SilverStrpe 4 compatible release

• Updated to work with SS4 rewrite of Authentication flow
• Cleaner code
• Improved actual two factor authentication