Not entirely sure why that was there to begin with...

Having the base href set completely screws up trying to make things work
in a subdirectory (basically, it means none of the actual content can be
found).
Now with more helpers!

Evidently all of your links will be horribly, horribly wrong if you are
using Sinatra in a subdirectory without using the url helper. As a
result, I'm now using it everywhere I can think of.