Rewrite the FAQ on how to run in development
Replace xhtml-combinators with blaze
Add documentation on how to build to README.md
The old documentation isn't very clear as to which instructions one should apply, so I've rewritten it to have clear headers for each version of Snap, and also provided a pointer to how it works for people who write code manually/have to port old code.
xhtml-combinators was being used only for it's text -> html escape function, and even then that was only for the error page. Rather than bring in a new dependency on this, I've rewritten the code to use blaze-html instead - which we already have a transitive dependency on through heist. I've also used snap-blaze to do the final rendering, so we can somewhat dog food our own libraries.
Clarify the behavior of snaplet filesystem installation in the tutorial