Single-Hung

This version updates:

• the annotation algorithm for higher ploidy levels based on simulations.
• encourages using of our KMC that speeds up the search for kmer pairs a lot
• adding a new warnings for mismatching estimates of 1n coverage by different approaches (was silent before)
• change in terminology, instead of "estimated ploidy" we say "proposed ploidy", as there is no model explicitly tested