Release 2.1.0

• Use the latest versions of samtools and picard by default.
• Add a reports output for use in downstream pipelines.
• Move collectAlignmentSummaryMetrics & meanQualityByCycle to top level
  workflow so they can be set to false for TALON-WDL pipeline.
• Tasks were updated to contain the time_minutes runtime attribute and
  associated timeMinutes input, describing the maximum time the task will
  take to run.