v0.10 (not yet released)
  * Improve speed by processing logs in parallel
  * Add -start_et_end option to begin monitoring new logs at the end,
    which significantly speeds up Cert Spotter, at the cost of missing
    certificates that were added to a log before Cert Spotter starts
    monitoring it
  * (Behavior change) Scan logs in their entirety the first time Cert
    Spotter is run, unless -start_at_end specified (behavior change)
  * Add/remove logs to match latest Chromium/Apple lists

v0.9 (2018-04-19)
  * Add Cloudflare Nimbus logs
  * Remove Google Argon 2017 log
  * Remove WoSign and StartCom logs due to disqualification by Chromium
    and extended downtime

v0.8 (2017-12-08)
  * Add Symantec Sirius log
  * Add DigiCert 2 log

v0.7 (2017-11-13)
  * Add Google Argon logs
  * Fix bug that caused crash on 32 bit architectures

v0.6 (2017-10-19)
  * Add Comodo Mammoth and Comodo Sabre logs
  * Minor bug fixes and improvements

v0.5 (2017-05-18)
  * Remove PuChuangSiDa 1 log due to excessive downtime and presumptive
    disqualification from Chrome
  * Add Venafi Gen2 log
  * Improve monitoring robustness under certain pathological behavior
    by logs
  * Minor documentation improvements

v0.4 (2017-04-03)
  * Add PuChuangSiDa 1 log
  * Remove Venafi log due to fork and disqualification from Chrome

v0.3 (2017-02-20)
  * Revise -all_time flag (behavior change):
    - If -all_time is specified, scan the entirety of all logs, even
      existing logs
    - When a new log is added, scan it in its entirety even if -all_time
      is not specified
  * Add new logs:
    - Google Icarus
    - Google Skydiver
    - StartCom
    - WoSign
  * Overhaul log processing and auditing logic:
    - STHs are never deleted unless they can be verified
    - Multiple unverified STHs can be queued per log, laying groundwork
      for STH pollination support
    - New state directory layout; current state directories will be
      migrated, but migration will be removed in a future version
    - Persist condensed Merkle Tree state between runs, instead of
      reconstructing it from consistency proof every time
  * Use a lock file to prevent multiple instances of Cert Spotter from
    running concurrently (which could clobber the state directory).
  * Minor bug fixes and improvements

v0.2 (2016-08-25)
  * Suppress duplicate identifiers in output.
  * Fix "EOF" error when running under Go 1.7.
  * Fix bug where hook script could fail silently.
  * Fix compilation under Go 1.5.

v0.1 (2016-07-27)
  * Initial release.