Add doc badge and fix link for #29.
Add doc badge and fix link for #29.

Alexx-G/openface,nmabhi/Webface,xinfang/face-recognize,nhzandi/openface,francisleunggie/openface,nmabhi/Webface,nhzandi/openface,sumsuddinshojib/openface,francisleunggie/openface,cmusatyalab/openface,cmusatyalab/openface,francisleunggie/openface,Alexx-G/openface,sumsuddinshojib/openface,nmabhi/Webface,nmabhi/Webface,xinfang/face-recognize,sumsuddinshojib/openface,xinfang/face-recognize,cmusatyalab/openface,Alexx-G/openface,sumsuddinshojib/openface,nhzandi/openface,Alexx-G/openface