New feature:
- Show current wind direction with a red arrow. Color can be configured.
Fixes:
- Removed max_width from readme. Not needed anymore. Fixes #69
- cardinal_direction_letters config fixed.
- Don't rotate the cardinal direction letters, when north offset is set. Fixes #7
- On refresh triggeered by the timer, the new windrose was drawn over the old one. Now the SVG is cleared.
- Now uses automatic color (black or white) depending on backgroundcolor for center calm percentage and the bar percentages. Can be overriden with the color config parameters. (experimental) Fixes #47