v0.2.0

Rewritten in C (previously C++).

• Single-writer architecture: each task's state is written only by its own
  daemon and represented entirely by files, with atomic transitions
  (open(O_EXCL) / rename()) for race and crash resistance (832e9d4, c1cce8d, 09a971c, 86404c8, 17f97ed, 9187851)
• New --pause / --resume and --purge (832e9d4)
• Improved --cancel: escalates to SIGKILL and warns if a process can't be stopped (3a304f7)
• Clearer task list and status output (7f1a247, 5f44d10, a04c1db, 25b808c)

v0.1.0

Add version info