Add configuration option to not link NPC HP token bar

[liquidox]

Not sure if you are taking PR's, but I wanted to give this a try, fixing a minor peeve of mine.

For me this resolves Roll20#402, as it's actually the only use case I have for it.

Please don't mind the long list of commits, the actual changes are quite small...

[symposion]

Hey, so you've done this the really hard way! :-) The code in this project is actually a generated file. The original code is modularised and has unit tests and a proper build system and it lives over here:
https://github.com/symposion/roll20-shaped-scripts
I can apply your changes manually to that code, but in future that's the place to submit PRs. If you're not already familiar with npm and gulp you might have a slight learning curve - basically you need to install nodejs and then run 'npm install' in the project directory, followed by 'gulp' to run the build.

[symposion]

Also, for future use, when submitting a PR you should learn the magic of squashing commits with interactive rebase in git. See e.g. http://push.cwcon.org/learn/squashing-commits.html

[liquidox]

Ah was wondering, I should have looked harder... have used webpack and node before. I'll also look into playing squash, thanks for the tips!