Building the default gravatar image correctly regardless of environment or protocol or port.
Using the term avatar in the method name to be consistent with the global variable name.
Merge pull request #150 from calasyr/fix-gravatar-mar6

Fixed avatar image url.
Getting the production host and protocol with only one method call now.
Merge pull request #151 from calasyr/better-host-url-mar6

Getting the production host and protocol with only one method call now.