CCHS-11
* Somewhat unrelated, but needed later on
* Adding PDB to calculations
* Still some testing needed before pushing this up higher
CCHS-11
* Making bias an optional parameter, do not apply correction if missing
CCHS-11
* Getting the bias stuff straightened out, found a few problems by testing
CCHS-11 CCHS-6
* Putting the bias values into the intersections
Pulled out interpolation call to be more explicit about it
Merge branch 'master' of github.com:USGS-CIDA/coastal-hazards into CCH-11
Merge pull request #898 from jiwalker-usgs/CCH-11

CCHS-11