Fix double formatting in mailcount for mbox.
segment/lan_ip: Fix for systems with multiple ips.

- Old version returned a list of 3 IPs, breaking the layout
- New version grabs the last IP, which appears to be the correct one
  that we want displayed, at least on this system.
- Also properly quoted variables and process substitution.
Clarify debug in README.
Merge branch 'acook/amc/multiple_lan_ip_fix'.
One quoting too much tho.
Add support for mailcheck to mailcount.sh
Merge pull request #161 from ryanakca/master

Add support for mailcheck to mailcount.sh
Update README with link to resolved issues.
Allow setting path or binary name of GNU grep

GNU grep isn't known as 'grep' on all systems. For example, on OpenBSD, it's
known as 'ggrep'. Allow customizing accordingly.
Merge pull request #163 from ryanakca/master

Allow setting grep binary name/path
Merge branch 'master' of git://github.com/erikw/tmux-powerline