cbmdos: bugfix, -A didn't allocate very last block
cbmdos: replace individual flags by one enum
cbmdos: new flag -0 for 0 availeble blocks

unlinke -A, BAM flags are still written
cbmdos: fix help text
bugfix: fix check for valid track number
bugfix: allocators forgot fixed first block
some informative output on successful runs

- tell where files were saved, warn if there is no output file
- print final block allocation to stdout.
mkd64_run() refactored for clarity/brevity
IBlockAllocator: do not support fixed start blocks

- fixed start blocks are handled the same whatever, so do the work in
  new method image_allocateAt() instead of requiring each
  IBlockAllocator implementation to do the same work here.
const-correctness in public API
const-correctness in private API
documented public API in doxy/javadoc format
pushed versions for 1.3b
Merge branch 'master' into release