• Source: https://github.com/simotek/scripts-config/blob/master/hiset.sh
• Blog: http://simotek.net/tech/hiset-multiple-history-files-and-sessions-for-bash-and-other-tinkering/
• Reddit: http://www.reddit.com/r/commandline/comments/270el1/hiset_managing_multiple_bash_history_files/

Hiset is a program for swapping between multiple bash history files.

* For __hst_help(), consider using a heredoc:

cat <<EOF
#content
EOF

• Fix colon in history: http://stackoverflow.com/questions/7641392/bash-command-preserve-color-when-piping