Example backends should not run by default

[bib1963]

Seems once installed, Tirex wants to run a number of backends. As far as I can see, only one is required. Having the others just confuses things. It does not help that the docs do not describe any of these.

All non-essential backends should not be configured to run by default. Just what the heck is wms?

It would be better to supply a detailed skeleton which allows people to modify.