Move docs generation to Travis & publish to docs.fineuploader.com repo

[rnicholus]

• Complete & test integration into build process. Should publish docs for new tags + branch updates. On master, copy docs to root of docs.fineuploader.com. Completed in Move docs generation to Travis & publish to docs.fineuploader.com repo #1769.
• Merge into all existing branches.
• Grab existing tags docs from Dreamhost server and check them in to VCS in docs.fineuploader.com repo.
• Merge docfu hotfix branch into master/develop & point fine-uploader at the released version.
• Update DNS to point docs site at docs repo.

[rnicholus]

tags backfilled in FineUploader/docs.fineuploader.com@2829e2f

[rnicholus]

Docs hosting has been switched from a closed Dreamhost server to GitHub pages and docs generation now happens on Travis-CI as part of the fine-uploader build.

😃