Version 0.15.0 alpha 7

• feat!: only allow one BAM file + port more code to Rust
• feat(call)!: max reads param
• perf(call): early-skip loci with >3 reads with extremely poor (slow) alignment
• fix(call): bad logic for pure SNV peak assignment read threshold
• chore(call): eliminate abs min read threshold for SNV incorporation
• perf(call): small optimizations for lambdas
• Logging:
  • chore(call): log how many workers we start if >1
  • chore(call): log allele determining time for slow loci
  • chore(call): log # loaded loci

Full Changelog: v0.15.0-alpha.6...v0.15.0-alpha.7