added a simple plotting scrip
added a simple plotting scrip

Added a very rudimentary plotting script of the PARCELS netcdf output
files:
- Can plot in both 2D and 3D.
- In 2D mode, can underlay a  tracer field (e.g. -f peninsula_P.nc)

Todo: ‘movie’ mode; time varying tracer field

OceanPARCELS/parcels,OceanPARCELS/parcels