Dynamically load plugins

Plugins are dynamically loaded. Their new home is the “plugins” folder,
in the root.
Organize bootstrapping code

Bootstrap code now has its own folder under the “./js”
Add fancytree files

Lots of fancytree files were missing, e.g. some extensions.
UI implementation of drag and drop on files panel

Only the UI side is working, no change is made to the filesystem.
Dummy web bootstrap

Chrome Developer Tools are amazing. It’s way more easier to work with
them.

This dummy web bootstrapper runs Codebot using a web filesystem (AJAX).
In the future, it will fetch files from a server, but now it just
generates dummy responses.