Renamed some variables in set_mesh() previous called "mesh_min" and "mesh_max" to alleviate confusion with the config options.
Renamed several attributes for clarity. The "calibrate" attribute is now bmc, "probe_params" is now "mesh_params", "probed_z_table" is now "probed_matrix", "mesh_z_table" is now "mesh_matrix".
Signed-off-by: Eric Callahan <arksine.code@gmail.com>