Epitope prediction : new module added.

-Adds genomic coordinates to predicted epitopes.
-Takes in parsed file generated from  ParseNetmhcOutput.pm and SNVs file as input.
Is this print just for information or are we building a file on standard out? If the former, it might be better as `$self->status_message('[could not resolve: %s]', $key)` or `$self->warning_message('[could not resolve: %s]', $key)`.

(A similar question applies to the candidates_line on line 94, though if it's only for debugging `debug_message(...)` or removing it might be better.)