Customiser: Herbs/plants sign generator

Another implementation of letters-on-spikes, but contrasting in several points:

* good customisability
* Stronger joints. Those use my joints lib http://www.thingiverse.com/thing:1764043
* Decent, symmetrical peg points for smooth ground penetration action

Finding a visually pleasing font which is available on thingiverse is still a challenge. None of those tentatively specified appear to be available. I've settled for three Google fonts "Lobster", "Pacifico" and "Chewy" now.
The font