Vision Face detection uses non-standard words

[jgeewax]

When I do face detection, the API surfaces uses certain terms for emotions, and we seem to be using arbitrary synonyms for those, which doesn't seem quite right...

I suspect it's because the sentence we were using for emotion to complete is "Is the face in this picture ______." When we should probably have used the sentence "Does the face in this picture show ____" for the emotions.

Us	API	What to do
Blurry	Blurred	Not sure
Dark	Underexposed	Not sure
Hat	Headwear	Change to headwear (eg, what about hijabs?)
Happy	Joy	Change to joy
Sad	Sorrow	Change to sorrow
Mad	Anger	Change to anger
Surprised	Surprise	Change to surprise

/cc @omaray (since this is beta blocking!)

[stephenplusplus]

PR sent: #1858