Adds TMPSF Utility test to test TMPSF workflow(s).
Adds example for preloading and applying calibration coefficients
Update Ion Functions
Work on the VEL3D example
Adds preload util test for CTDPF
Adds SparseArray support to PyDAP handler

 - Adds handler for SparseConstantType
 - Adds new util test to work with sparse values
 - Updates VEL3D sample coefficient file
Should fix r2_full issue with sparse values
Merge pull request #1319 from lukecampbell/tmpsf

Tests Pass, Merging Multiple Fixes