Route to the welcome view per default.
Add a very simple landing page.
Make the menu affix.

In order to have something that works well when doing the affix, I needed to
"hardcode" the fluid grid sized into the CSS.

It seems to be the way to go, even if I find it a bit hard to maintain. Maybe
using a CSS pre-processor would make things easier to handle here.
Add a help message for newcomers
Set the size of the menu for small screens.
Remove the min-height from the popover
Update the README file.

Just to make it a bit clearer, so that people are less-lost when they discover
about the project.
Store the formid in flux.

This allows us to delegate the backend handling to flux directly (instead of
the components themselves like it's the case currently).