Updated feature: Gleez Gravatar v1.4.0

Gravatar::getValidFormats  - Get list of valid picture formats for downloading
Gravatar::getValidTypes    - Get list of valid picture mime types for downloading
Gravatar::getStoreLocation - Get current store location for downloading pictures
Gravatar::setValidFormats  - Set list of valid picture formats for downloading
Gravatar::setStoreLocation - Set store location for downloading pictures
Gravatar::download         - Downloads gravatar to location on server