updated gravatar_link to use current API
updated gravatar_link to use current API

modified URL, trim/lowercase email before creating md5, lowercase
rating, url encode $default_image, removed border, which doesn't appear
to work any more, moved default image url to the end of the query string
just to make the output easier to read for trouble-shooting

kelaskakap/cms-api-unggun,PeterRock/Ci-Bonfire3,PeterRock/Ci-Bonfire3,kelaskakap/cms-api-unggun,PeterRock/Ci-Bonfire3,kelaskakap/cms-api-unggun