v4.0a

Avoid this release. It has a bug that can cause data loss, especially with HFE.

Release Notes:

• Contains fixes up to v3.28 from v3 stable release series
• New asynchonous I/O handling (Eric Anderson / ejona86)
  • Smarter prefetching of cylinder data
  • Smarter writeback of modified tracks/sectors
  • More accurate emulation
  • No change was made for DSK images and QuickDisk
• Hard sector HFE image support (Eric Anderson / ejona86)