Move to using npm for JS packages (and Bootstrap)

This involves a Makefile, used to copy the node_modules to
within the cycledash project. This commit also changes the src
of all the scripts now included with npm.
Moved libs under source control.

c.f. http://www.futurealoof.com/posts/nodemodules-in-git.html
Moved initialization to bash scripts, cleaned up node module management with make.
Address CR, clarify.
Merge pull request #22 from hammerlab/move_to_npm

Move to using npm for JS packages (and Bootstrap)