Improved support for Lines and Strings.
Adjust packaged documentation for Mac (Cmd) or Windows/Linux (Ctrl).
Support for X-Plane v10 networks.
Draw selected node on top.
Use separate VBO for network/vector line data. Draw from this indexed.
Use numpy to speed up DSF loading.
Fix for draping when DSF file absent.
Speed up drawing using per-texture per-layer buckets.
Eliminate old drawing code.