v2.4a

Release Notes:

• This release fixes many raw track formats (SSD, DSD, OPD, VDK, ...)
  • Thanks to John Gray for bug report, and testing!
• RAW: Fix FM track generation
  • FM and IAM flags not plumbed through from front-end image handlers
• RAW: Fix interleaved/skewed track generation
  • Data fetch not loading sectors from image file in the right order