Remove the term shearline

Rename files to complete commit e404bacbbd81a173da9ce1f007e2e448e487b0b2

Conflicts:
	demo/bickley_jet/hyperbolic_shear_lcs.m
	demo/bickley_jet/hyperbolic_shear_lcs_details.m
	demo/double_gyre/elliptic_hyperbolic_lcs.m
	demo/double_gyre/elliptic_hyperbolic_lcs_details.m
	demo/ocean_dataset/elliptic_hyperbolic_lcs.m
	demo/ocean_dataset/elliptic_hyperbolic_lcs_details.m