Removed getCapabilities() in favor of getCapabilityLayer()
Updated openlayers-animation dependency
Added parser that parses WMS time range/step combinations into timesteps
Take layer availability information from GetCapabilities results, not global data
Different time selection policy for observations and forecasts

- For observations, show previous available data
- For forecasts, show next available data
Only show relatively current data

- Only show data if data timestamp isn't too far from requested time