v77 - 2020-02-29

Until now, image files were accessed in buffered mode. Because of issues with volumes containing a very large number of files, I switched the access to unbuffered mode, like when encrypting a full hard drive or partition.
This might break compatibility with exotic hardwares (for instance with sector size smaller than 512 bytes or bigger than 4KB). In this case, the -bio switch can be used to restore the previous mode.

I also removed several previous releases (from 2.2.0 to 2.5.0), because of antivirus false positives for 32-bit executables.
This version brings a smalll change that makes these alerts disappear.