Use string representation
use SecureRandom for ruby

Issue #9
Merge pull request #10 from zendesk/sdavidovitz/secure_Random

use SecureRandom for ruby
Support for return_to param.
Node: add support for return_to
C#: add return_to support
PHP: add return_to support
Django: add return_to support
Flask: add return_to support
Rails: add return_to support
ASP: return_to support
Support for return_to param.
Support for return_to param.
Merge pull request #11 from johnou/return_to

Support for return_to param.
Merge pull request #12 from zendesk/sdavidovitz/return_to

return_to support
adding UTF8 encoding function
added updated base64 encoder to bundle