Tighten .npmignore ; use babel as transpiler#1

Merged

podefr merged 3 commits intopodefr:masterfrom

wbazant:master

Aug 1, 2017

Commits on Jul 27, 2017

Only publish the lib directory and package.json to npm
wbazant
committed
Use babel to prepare the lib directory as an alternative to webpack's umd mode
wbazant
committed

Commits on Jul 31, 2017

Clean up .npmignore and formatting
meclav
committed