corrected typo in mean_field_solver.py
Revert "minor changes to accomodate resolution variable as an array instead of an integer"

This reverts commit bb7a377eeb176b8d093cd6bf0377b5ecd0a2389c.

Conflicts:
	catmap/solvers/mean_field_solver.py
Revert "minor changes to accomodate resolution variable as an array instead of an integer"

This reverts commit bb7a377eeb176b8d093cd6bf0377b5ecd0a2389c.

Conflicts:
	catmap/solvers/mean_field_solver.py