refactores file to generate goobook.rc with username
deleted username file from repo after ignoring it
install-basic now assumes the existence of ~/.localmail-username-gmail, has to be created by user
factored msmtp.rc generation into separate script for username segregation
refactored out personal custom gmail config
gpg.rc with personalized section on the tail
signature file also expected in customization dir, not in repo anymore
goobook configs using localmail-custom dir path
install-basic and msmtp with customizations dir path
offlineimap with customizations dir path
generalized cron-jobs with /home/joaopizani