Parallel SINA - Preview

Parallelization adds a whole new class of bugs that become possible. If this breaks, stalls, crashes or otherwise misbehaves, please create an issue!

• process sequences in parallel (#17, #31)
• add support for gzipped read/write (#29)
• add support for "-" to read/write using pipes
• remove internal pipeline in favor of TBB
• add option --add-relatives; adds ref sequences to output (#19)
• add logging with variable verbosity (#14)
• be smart about locating arb_pt_server binary (#30)
• add --add-relatives adding search result to output (#19)