Site-specific boxmox information possible.

MANIFEST.in

 exclude boxmox/hub.py
+exclude boxmox/_site_specific.py
 recursive-include examples *
 include CHANGES.rst
 include INSTALL.rst

boxmox/__init__.py

+try:
+    from _site_specific import *
+except:
+    pass
+
 import _installation
 
 from data import InputFile, Output, ConcentrationOutput, RatesOutput, AdjointOutput, JacobianOutput, HessianOutput