Improvements to GWF reading
This PR introduces two enhancements to the TimeSeries.read() functionality for GWF input
- added the
formatkwarg to thetimeseries.io.cache.read_cachemethod, allowing the frame library readers to call back to the cache reader when a user specifiesnproc > 1 - re-enabled auto-identification of GWF files, the order of library imports means frameCPP will be used by default for GWF reading