Support CLI

[qfox]

I was wondered to not see html2bemjson bin after installation.

What you think about bin? With api like:

cat $htmlfile | html2bemjson > bemjson
# or
html2bemjson $htmlfile > bemjson
# or
html2bemjson $htmlfile -o bemjson

[tadatuta]

sounds reasonable 👍

[voischev]

👍