Fix up many and varied spelling issues, the main one being "Coypright".

Ran the comments and strings through a spelling check and came up with all these.

examples/BigCosmoVolume/makeIC.py

###############################################################################
# This file is part of SWIFT.
- # Coypright (c) 2015 Matthieu Schaller (matthieu.schaller@durham.ac.uk)
+ # Copyright (c) 2015 Matthieu Schaller (matthieu.schaller@durham.ac.uk)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published