manta-0.15.0

• MANTA-108 combine clip/semi-aligned evidence detection, don't detect
  overlapping reads as assembly evidence
• MANTA-98 make fewer bam scans during scoring
• MANTA-106 add high depth limit to candgen and assmbler
• MANTA-75 Better match reads to SV candidates to improve
  runtime and lower repeat observations (part 2)
• MANTA-105 filter poorly supported candidates to reduce per-edge compute time
• MANTA-103 fix issue in RNA and WES modes introduced by MANTA-99