Removing libdbgfm
Adding an FMIndex implementation that just uses repeated command-line calls out to rlcsa_grep to do all its work.
Switching over to upstream contexts and sending out Positions, and pulling out the brute-force N^2 mapping stuff into its own trait
Adding a builder to help with the haplotype file making and reverse complementing and sequence name management and such
Making index building actually move the right files.
Added unit tests for building and mapping into a contig-annotated haplotype index