Install deps of compat-table to avoid make clean installs.

With git dev-dependences in package.json, the dependencies of that dependent
seem to be reinstalled every time we run `npm install`; we run `npm install` every time we 
run `make clean`. To avoid these downloads on `make clean` we install the recursive dependencies
directly. 
Switch to kangax repo.
Fixes #1178
I updated the commit message.