Get rid of browserify and as many other dependencies as possible

[taoeffect]

• Related to #72 (load times of admin interface)
• Each dependency is an additional security risk.

--- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/6891056-get-rid-of-browserify-and-as-many-other-dependencies-as-possible?utm_campaign=plugin&utm_content=tracker%2F528702&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F528702&utm_medium=issues&utm_source=github).