For all files in morpho:
	1) Add meta check on dimension whit respect to neighborhood.
	2) Remove inline for all files but for fast_morpho and internal
	functions.

	* src/morpho/geodesic_erosion: Now geodesic erosion takes
	a neighborhood as input instead of a structuring element.
	* src/morpho/geodesic_dilation: likewise.
	* src/morpho/reconstruction: likewise.
	* src/morpho/extrema: likewise.

	* src/level/connected_component.hh: likewise and fix.
	* src/level/extrema_killer.hh: likewise and fix.

	* src/convert/conversion_ng_se.hh: New file.

	* demo/test-reconstruction.cc: fix it because of above modifications.

	Definition of get_se<N>, i.e construct a S.E from a dimension N.
	* core/window.hh:   Definition of get_se<N>.
	* core/window1d.hh: Definition of get_se<1>.
	* core/window2d.hh: Definition of get_se<2>.
	* core/window3d.hh: Definition of get_se<3>.

    prcs2git-id: 0_3.7