Improve web demo docs.
Improve web demo docs.

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