* Adds WADO-RS and QIDO-RS support
* Reworks download mechanics. Fascilitates direct download when you know the ids by introducing DICOMObjectReference. This base for Series-, Study- and SOPInstanceReference can be downloaded directly
* Introduces CachedSearcher to avoid unneeded queries
* Simplifies and clears up trolley download methods by upgrading DICOMDownloadable to base class
* Simplifies automatic querying for missing ids. Downloader instances can now raise Exceptions for insufficient download info (missing instance, series ids)
* Simplifies Query class structure. Removes BasicQuery class in favour of Query+Exception for unconvertible query parameters
* Updates docs: Moves from single github readme to separate readthedocs build
* All code examples in docs and /examples are now tested
* Main branch is now called main. Removes branch master.