Add home server mail configuration files

This adds a '50_home.muttrc' file which contains a few mutt options
specific to the configuration on my home server.

Additionally, the postfix main.cf configuration file was added, which
is being used to relay outgoing emails through smtp.google.com.
Authentication to google's smtp relay is achieved via the
/etc/postfix/sasl/passwd file. See the following blog which was used as
a reference for the postfix configuration:

    http://blog.bigdinosaur.org/postfix-gmail-and-you/

Signed-off-by: Prakash Surya <surya1@llnl.gov>
Add additional configuration for mail

This commit adds some more configuration settings for mutt and
fetchmail. Also, the TERM variable is now explicitly set, to support 256
color terminals which is useful for applications like mutt and Vim.

Signed-off-by: Prakash Surya <surya1@llnl.gov>