Reduce setup bloat

[JennaSys]

For consideration as a "feature" request, would it make sense to pull the docs, demos, and tutorials out of the pip transcrypt installation and just have those online or as a separate install that would put them in a specified user folder for easier access? Or possibly use the pip --install-option parameter to optionally install those files to a user folder. (I haven't done that before myself, so not sure if that's possible)

Reasons:

1. It's awkward to get to those files digging down into site-packages, if you even know that they are there in the first place.
2. It unnecessarily bloats the installation of Transcrypt when most of the time, you generally don't need them after you get past the learning curve.
3. That info is already available via transcrypt.org (I think)

The parcel_demo in particular is the main offender to bloat right now since it is including a node_nodules folder that is 60MB (!)