Merge pull request #124 from asfadmin/master

Fixes from us1954_don_angles branch - adding local incidence without rtc
Remove reference to disused HDF-EOS5 header.
Merge pull request #126 from ninneman/devel

Remove reference to disused HDF-EOS5 header.
Disable creation of unused variable.

The call to aasin fails in newer versions of PROJ.4 due to new calling conventions. Since the result of aasin isn't used anyway, it's easiest to just comment it out.
New tool: add_aux_band

Adds another band to the input file with incidence angles or doppler
or whatever the user requests on the command line.  For example:
  add_aux_band incidence_angle in out

So far I have implemented incidence angle, look angle, slant range,
doppler, time, latitude, and longitude.

This is for JPL, who needs to be able to add incidence angles as a
second band before geocoding in order to get those values without
having to perform terrain correction.
Build new tool add_aux_band by default.
Merge branch 'devel' of https://github.com/asfadmin/ASF_MapReady into devel
Merge pull request #129 from asfadmin/add_aux_band

New tool for Don and JPL - add_aux_band
Merge pull request #130 from asfadmin/devel

add_aux_band - preparing for build to give to JPL for testing