minor cleanup of formatting
stubbed out subsamplGLM and getSurface
pulled out vars for time and wtr
function getSurfaceElevGLM
function getSurfaceElevGLM
function subsampleGLM for compare w/ field
Lake Mendota LTER water temps
test for how far date is from given
added basic plotting compare
added note to self for change to this
Merge pull request #7 from jread-usgs/master

Added two new functions for getting surface elevation and subsetting depths