Bugs, precheck for strong connectivity, preparation for removals

- bug in EMD for constellations fixed (MIP_search_reentry.m l. 247/8 +
261/2 now)
- also bug in L1 for constellations, approximation might not be good at
all, it's better to use it only for constellations and EMD for
distributions
- option to pre-check for strong connectivity (but there are still
problems in recomputing the unidirectional cut-concepts)
- Problems with phi_comp_bORf_unidir (not solved yet)
-