Change install prefix

Changes the naming convention of the install prefix.

Small updates

Adds an additional environment variable pointing to the install prefix of the compiled code. Update the toolchain configs for NERSC machines.

Bump tractor to 5.2

Another attempt at imaging target working with python3.

Fix tractor installation with ceres

1.1.8

Add the fitsverify utility to the compiled packages.

Bump versions of toolchain on cori

1.1.7

bump toolchain versions on cori

Updated Tractor and Many Small Fixes

This fixes many small things and also bumps astrometry.net and tractor to versions for use with the imaging survey DR 5.

Conda Recipes

This includes conda recipes for desi dependencies which either do not exist in other channels, or which require special compilation. For example, we build boost on OS X with native clang and c++ standard libraries in order to enable support for C++11. Also fitsio is built against the library provided by the cfitsio package, in order to prevent version conflicts.

Additional Dependencies

Changes since last release:

• Fixes to tractor / ceres.
• Add cython, photutils, psycopg2, basemap, and seaborn to dependencies.

Fixes for Imaging and Ipython

This includes the scamp package and dependencies. Also changes the installation of ipython so that it always comes from the Continuum channel in order to have nice color and readline support.