Created `Catchment` object.
Setup documentation
Setup documentation
qmed by channel area
Added tests for QMED by area
QMED by area is catchment area!
QMED from 1999 descriptors
Added `AmaxRecord` object and QMED from AMAX
Added convenience method to use best available QMED method
Seperated QMED analyses from catchment. Added 2008 method.
Added urban adjustment factor
Added donor adjustment.