[bash-timer] Supported non-decimal locales, properly in Bash v5.

Fixes #6
Fixes hopeseekr/BashScripts#7
Fixes hopeseekr/BashScripts#8

[bash-timer] Greatly refactored ns math to properly calculate seconds…

… and ms.

Fixes hopeseekr/BashScripts#7.

[bash-timer] Added support for locales with the comma decimal separator.

Fixes #6.
Addresses hopeseekr/BashScripts#7.

[bash-timer] [m] Minor release management documentation tweaks.

[bash-timer] Now test that Travis-CI passes.

[bash-timer] Added blurb about my dev aliases.