Improve web demo docs.
Improve web demo docs.

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