Build process should copy extra static files

[imaustink]

In addition to copying the bundles, we should also copy static files from the /extra folder of the template plugin. This would be useful for things like image and Worker files.

The change should probably happen here: https://github.com/bit-docs/bit-docs-generate-html/blob/master/site/default/static/build.js#L41

Justin brought this up here: https://bitovi.slack.com/archives/C09R50SAE/p1499289208210257

[chasenlehara]

@justinbmeyer There’s already code for copying static files into the build:

bit-docs-generate-html/build/static_dist.js

Lines 82 to 84 in 0219141

	if(options["static"]){
	return fss.copyFrom(options["static"], buildFolder);
	}

Would it be best to just use that instead of modifying the code mentioned in this issue’s description?

[justinbmeyer]

@chasenlehara yeah, probably. Thought we should make it so static can be an array of sources. Lets talk about this at some point.

[chasenlehara]

#41