Update README.md: added example how to use web-cam

Alexey

2016-12-10 cf29681a5040bf4114672181cd18609065d3a3ef

 .gitignore

@@ -1,11 +1,20 @@
*.o
*.dSYM
*.csv
*.out
*.png
mnist/
data/
caffe/
grasp/
images/
opencv/
convnet/
decaf/
cnn
submission/
cfg/
darknet
.fuse*

# OS Generated #
.DS_Store*