Ease debugging by reading the whole descriptor table before decoding it
Added oprator descriptors
Distinguish between code/flag fields and proper numeric fields
Install sphinx too in dev environment
Take operators into account when decoding values
Take operators 201-208 into account when decoding noncompressed data (untested)
Added support for operators 201 and 202 in compressed messages

Fixes #2
Added description of BUFR data model and hwo bufrpy presents BUFR data