continued work on correlation functions
- dropped split_horz_correlations
  - use horz_correlations_sets instead
- rotate_correlations functions reduced
  to only the newest version
- rotate_correlations now defaults to
  rotating to radial & transverse
- noise routines updated for rotate_correlations
  changes and to better handle horiz autoxc sets
- several documentation improvements for clarity
- renamed gshhs functions to gshhg
- updated install & uninstall scripts to better handle
  lack of internet connectivity
- updated globalcmt* to handle lack of internet
- bathymetric excitation functions now include body
  wave excitation
- mmap fixed to plot coastlines et al over images
- plot_tauppath now can plot everything in a subplot
- minor editing on fss (still in progress)
- minor documentation updates elsewhere
- added getspline & removespline
  - requires spline toolbox
- getpolynomial now returns the timeseries based
  on the polynomial fit by default for easy
  checking and comparison
- getpolynomial & getspline have an option to
  return polynomial coefficients instead of
  timeseries
- removepolynomial/getpolynomial documentation
  was incorrect in stating the 2nd input was the
  polynomial order when it was actually the
  degree of the polynomial
- initial changes necessary for adding additional
  crustal models (breaks a few programs such as
  crucor, etc)
- added readcrust10 to read in Crust1.0
- added Crust1.0/5.1 models
  - use readcrust10 for Crust1.0
  - use readcrust2 for Crust5.1
- modified the Crust2.0 format output
  from readcrust2 (for getcrust speed)
- crustal model option now available in:
   getcrust, crustless_raypaths, crucor
- update examples to reflect changes
- plotbathyexcite input arg order changed
  to better match that of bathy_micro_excite
- cmb_corrections & corediffracted_ttcorr
  updated for crustless_raypaths & crucor
- install_seizmo updated for zip file
  location change (moved models to s3)
- dropped unnecessary Crust2.0 functions
- more model data moved to models zip file