Changes

1.4.5  September 6, 2018
  - Use https:// in login_url

1.4.4  January 15, 2013
  - Set Content-Length on file uploads
  - Be careful not to change the configuration hash

1.4.3  Sep 11, 2012
  - Don't recalculate the timestamp if it's provided

1.4.2
  - Minor tweaks

1.4.0
  - Expose the sign_params as a utility method

1.3.2  August 14, 2012
  - Set Content-Length on file uploads
  - Make login_url take an optional host parameter for
    what domain to login the user one
  - Handle JSON and non-JSON responses properly

1.3.1  March 15, 2012
  - API to create multiple objects with separate configurations
  - Make errors be null again instead of undefined
  - Increase timeout to 45 seconds

1.2.2  March 12, 2012
  - Better implementation for UTF8 length determination

1.2.1  March 12, 2012
  - Correctly calculate Content-Length for UTF8 strings

1.2.0  March 10, 2012
  - New post_form() function supporting signed fileuploads
  - Send appropriate user-agent with requests

1.1.1  March 5, 2012
  - Make sure the Content-Length header is sent for POSTs

1.1.0  March 5, 2012
  - Better error handling
  - Handle requests with no parameters specified
  - Add login_url() example

1.0.0  January 16, 2012
  - Initial public release