Add SHAA as embed provider

[mianno]

Hi, We are an italian company that develops Interactive media (video and images). We would like to become an embed provider, implementing the oembed standard for its own widget (video player, interactive image, interactive galleries, interactive reader, etc.), enabling discoverability. Let me know if we are in the righ direction. Thanks in advance

[iamcal]

tests are failing:

Warning: yaml_parse_file(): parsing error encountered during parsing: did not find expected '-' indicator (line 3, column 1), context while parsing a block collection (line 2, column 1) in /home/travis/build/iamcal/oembed/test.php on line 27

[ItsWarmaster]

Please remove the pull request and make a new one when fixed with valid YAML