[OSM-talk] Osm at Home client update

[J.D. Schmidt]

With the help of Barry Crabtree the bugs involving attempted beziercurve 
hinting of zero length segments has been squashed.

New Osm at Home client uploaded to SVN.
Wiki page for Osm at Home updated with installation instructions.

Changelog for the osm at Home client :
Updated to use osmarender4
changed download of osmarender + stylesheets to point at SVN
changed downloadrate of osmarender+stylesheet so it happens at the start 
of a run, not for each data download.
implemented beziercurve hinting by calling dotbaz's lines2curves.pl script.
implemented sanitycheck in case beziercurve hinting fails, and fallback 
to non-beziercurve rendering in that case.

OSM at Home renderers should upgrade immediately.

Future plans :
Tweak stylesheet during this weekend.
implement beziercurvehinting for Tiles at Home client as well this weekend.

J.D. "Dutch" Schmidt