v5.4.5
tuklib_integer: Revise unaligned reads and writes on strict-align archs.
Bump version and soname for 5.4.5.
xz, xzdec, lzmainfo: Use tuklib_attr_noreturn.
xzdiff: Add support for .lz files.
xz: Windows: Don't (de)compress to special files like "con" or "nul".
Build: Prepare to support Automake's subdir-objects.