parameter mappings for YSI instruments

[evanleeturner]

Several parameter mappings are missing for some old YSI 6920 models. Example code snippet from the file insert:
/var/www/coastal/env/local/lib/python2.7/site-packages/sonde/formats/ysi.py:120: Warning: Un-mapped Parameter/Unit Type: ysi_binary parameter name: "DO" ysi_binary unit name: "%" Warning) /var/www/coastal/env/local/lib/python2.7/site-packages/sonde/formats/ysi.py:120: Warning: Un-mapped Parameter/Unit Type: ysi_binary parameter name: "DO Charge" ysi_binary unit name: " DOchrg" Warning) /var/www/coastal/env/local/lib/python2.7/site-packages/sonde/formats/ysi.py:120: Warning: Un-mapped Parameter/Unit Type: ysi_binary parameter name: "pH" ysi_binary unit name: "mV" Warning) /var/www/coastal/env/local/lib/python2.7/site-packages/sonde/formats/ysi.py:120: Warning: Un-mapped Parameter/Unit Type: ysi_binary parameter name: "Chlorophyll" ysi_binary unit name: "ug/L" Warning)

[evanleeturner]

This is now handled in sonde3