UCI parser

[timcera]

New UCI parser that parses all HSPF tables.

* Default and validation when for all parameters.
* Default and validation support metric or english units as appropriate.
* Parameter reading function for UCI returns dictionary of
  pandas DataFrames keyed to the HDF table names.
* Reads UCI supplemental files.
* Reads UCI and WDM files from local files or URIs.

src/hsp2/hsp2/ATEMP.py: if ELDAT=0 then can just return.
src/hsp2/hsp2/GENER.py: removed UCI parsing code, as it is not needed for the new implementation.
src/hsp2/hsp2/GQUAL.py: refactor
src/hsp2/hsp2/HYDR.py: remove unused hydr_load_om, fix DEWTEMP -> DEWTMP, refactor
src/hsp2/hsp2/PWATER.py: ui["ICEFG"] must be an integer not a float, refactor
src/hsp2/hsp2/RQUAL.py: PKCF1_ and PKCF2_ need to be PKCF1 and PKCF1 respectively, refactor
src/hsp2/hsp2/SEDTRN.py: expand_SEDTRN_metadata, refactor
src/hsp2/hsp2/SNOW.py: refactor
src/hsp2/hsp2/main.py: In one place OXFG -> OXRX, refactor
src/hsp2/hsp2/utilities.py
  added deprecated decorator function
  added _normalize_memsb function
src/hsp2/hsp2io/control_file_readers/read_uci_parameters.py
  parse both local and remote UCI files
src/hsp2/hsp2io/control_file_readers/utils.py
  fill defaults and validate the parameters
src/hsp2/hsp2io/hdf.py: for GENER there was partial processing of UCI files,
  but this is no longer needed, so removed/changed.
src/hsp2/hsp2io/time_series_readers/read_wdm_ts.py
  read both local and remote WDM files
src/hsp2/hsp2tools/readUCI.py
  internally shifted to use new functions, marked deprecated
src/hsp2/hsp2tools/readWDM.py
  internally shifted to use new functions, marked deprecated
src/hsp2/state/state.py
  Have to bypass DISPLY and PLTGEN since only used in HSPF