Change indentation from tabs to spaces
Changed indentation and added quick comments to neighbour_t class
Implemented calculation of nearest neighbours with a definable radius for surface anisotropy calculations.
Corrected eij vectors for serial version
Bugfix: Fixed incorrect definition of local atom in surface anisotropy calculation
Bugfix: Fixed copying of ij position vectors in MPI version
Added detailed information for surface anisotropy debugging
Fixed indentation of periodic boundary code
Merge branch 'bulk_neel' into develop

Conflicts:
	src/simulate/sim.cpp
Bugfix: Fixed rare event of missing atoms in parallel decomposition
Added new keyword to control nearest neighbour range for surface anisotropy calculation.
Removed superfluous statement in geometry file input
Added default return for check_for_valid_bool function