change inf-ruby Ruby interpreter into inf-ruby.
add custom function and key binding [C-l] to locate to current time *now* in Org Agenda buffer.
add a custom function to apply Org habits format for headline.
re-enable org-ac.
add package crontab-mode.
change mode-line workspace2, major mode color, and font.
set Org table color, but keep color to default value.
stop use msmtp, return to default sendmail for mu4e to send E-Mail.
add a function and keybinding for set scheduled and deadline time for a headline.