proof-of-concept for hot-swapping of routes
framework for reloading
on-demand reloading of client-side assets
added callbacks to css and js reloading, issue #2010
closed #2011
closed #2012
allowed the "forum updated" message to show up for reloads as well
Merge branch 'hotreload' into 0.5.1

Conflicts:
	public/src/forum/admin/index.js
	src/meta.js
closes #1284