[Haskell gravatar implementation
Don Stewart <dons@galois.com>**20080303230101] 
[implement full gravatar api
Don Stewart <dons@galois.com>**20080304021918] 
[Full test coverage
Don Stewart <dons@galois.com>**20080304175835] 
[bump version and point to test coverage
Don Stewart <dons@galois.com>**20080304175941] 
[add more docs
Don Stewart <dons@galois.com>**20080304180151]