Unknown route shows projects page

[jayvdb]

https://coala-projects.netlify.com/#/foo redirects to projects page.

This is effectively a 404 page, and should have a 404 message that is more tailored for this website.

[jayvdb]

This maybe already covered by #596

[KVGarg]

This just needs removal of the otherwise route config - https://github.com/coala/projects/blob/master/resources/js/app.js#L61