MAUS-v2.3.1

Written for MAUS by Adam Dobbs on 2016-06-01

MAUS-v2.3.1 has been released. The following changes were made:
    - Minor EMR update
    - Scifi kalman filter updates, pz residual offset fix
    - Scifi trackpoints datastructure update
    - Geometry test fix
    - Doxygen updates
    - Hot fix - Django version updated
If upgrading, please redo the entire build.