- Refactor completion generation script.
- Update docker-machine completion.

- Replace urlencode/ urldecode with Python3 instead of Perl.
- A little cleaner json_tool usage.
- A Python3 only (no Python2) AWS region deducation.

- Added monitor alias to notify on command finish or failure.
- Better use of Python's json.tool.
- Little tweaks.

__run_duration returns 0 when it can't calculate the command run duration (when the shell doesn't have support for PS0, like ksh).

Rewrote prune_prerun (prune prerun files used to time shell commands) because grep on OpenBSD doesn't have support for null-terminated strings.

- Added shell function to echo with color.
- Added shell alias to alert (bell).

be triggered?).

Use the hash since it's always 40 characters long and won't hit the maximum length of system pathname.