Creating vegetation fraction and function ancillary files for CABLE

Original description and code for ACCESS 1.3 from Rachel Law. Code cleaned up and modified to work on the ENDGAME grid by Martin Dix.

Code is in the repository at https://trac.nci.org.au/svn/access_tools/cable_ancils.

For a log of the revisions see https://trac.nci.org.au/trac/access_tools/log/cable_ancils.

Data for the historical period and RCPs is on cherax in ~wan028/lulcc-ncar, directories

pftlandusedyn.0.5x0.5.aim.simyr2005-2100.c100318
pftlandusedyn.0.5x0.5.image.simyr2005-2100.c100121
pftlandusedyn.0.5x0.5.message.simyr2005-2100.c100121
pftlandusedyn.0.5x0.5.minicam.simyr2005-2100.c100121
pftlandusedyn.0.5x0.5.simyr1850-2005.c090630