Convert water colums to absolute water levels.  Only rudimentary code yet (but works).
Function read.diver.geometry() reads CSV exported from Excel.
Some sample code for testing.
read.diver.geometry() now has nicer and more flexible interface, documented in README.
Is still adapted to my local file format idiosyncrasies, however.
read.diver.geometry() checks that all required col.names are there.
Variables do.fixfiles, do.readdata, do.compensation for skipping time-intensive parts.
read.diver.geometry() has 'unit' argument (cm or m) for input data; result is in m.
Function calc.abs.head() for absolute heads from water column and geometry.
Reads all geometry info, adding the short names.
Only test case WAS205 yet.
More sensible interface for calc.abs.heads(): takes wat.col (zf) and geometry (dataframe) for one logger, instead of lookup in the complete datasets.  Calculation for all divers with mapply().
Merge branch 'logger-geometry'