add new example geos_demo_2.py
geostationary example contributed by Scott Sinclair
added labeldistance to pie
Turned mathtext in SVG into single <text> with multiple <tspan>s
prep for 0.90.1 release
change warning messages in drawparallels and drawmeridians
fix typo
Display only meaningful labels when calling legend() without args
Small corrections to errorbar
Set markers to same alpha value as line
