Removed express includes in submodules and added separate view directories for each submodule.
Moved view files to each submodules view directory.
Reformatted route calls so that each module has its own router and can access the db at the same time.
Moved the views back to a single views file in order to accommodate express.js' singular app views setting. The previous way that views were held in separate directories was in 3.x, but it is no longer possible without breaking the code.
Merge branch 'master' of https://github.com/MatteoVH/roommates

Conflicts:
	lib/bills/index.js