METBK data products
Merge pull request #193 from desiderr/met

CIDEVMI-1043: METBK data products
Adds tide and wave functions for presf
Merge pull request #194 from cwingard/presf

CIDEVMI-1059 Adds SFLPRES-TIDE and SFLPRES-WAVE functions for PRESF
added code to deal with different frame_types
Merge pull request #195 from crisien/nit

added code to deal with different frame_types
Adds Partial Pressure of CO2 in Air or Surface Seawater
Updates README
Merge pull request #196 from cwingard/pco2

CIDEVMI-1091 Adds Partial Pressure of CO2 in Air or Surface Seawater
Adds wrapper functions for VELPT instruments
Merge pull request #197 from s-pearce/velpt

Adds wrapper functions for VELPT instruments