What's new in thtk 5:

Make: --enable-combine was removed.
thanm: The sentinel instructions are left out from the scripts.
thecl: Bogus rank flags will not be displayed for TH07.
thanm: The new format will be handled correctly (by ignoring the Format: field).
thtk: The h command has been removed, run the program without a command to see the usage.
thdat: The code has been refactored.
thdat: A shared library is available.
thdat: A command for listing the contents of archives was added.
thmsg: Support for TH13 has been completed.
thecl: Support for TH13 has been completed,
       compatibility with the trial was lost.
thanm: Support for TH13 has been completed.
       One file is not properly reconstructed due to the same bug that affects
       TH12.
