Added
* timeout config key to limit the crawling time
Fixed
* THREDDS server v5 compound serviceType not expanded (22)
* Crawling takes too long for large (>100 datasets) catalogs (23)
Changed
* Retrieve WMS layers in cell instead of while crawling (23)
* Switched from thredds_crawler to siphon Python package (22 + 23)
* Replaced workers config key with maxtasks