[Mapcss] Ceyx progress

[Sebastian Spaeth]

Hi all,

I've boasted about this already on IRC, but here it is for everyone...

inspired by the Kothic_JS progress, I took another take at ceyx and
improved the text rendering. I tweaked the label placement on straight
pieces and implemented "text along curves". This increases the
usefulness of ceyx for those that might want to give it a try.

It also gained a batch rendering mode where it can produce several tiles
at various zoom levels with the same data file. Tiles are put in a
folder structure suitable for OpenLayers.

The one thing that is still lacking are one-way arrows (in my personal
preference list).

Have fun hacking,
Sebastian