Add manpath
Add environment variable substitution.

Configuration files that require hard-coded paths and settings can now be
specified under dynamic_files.txt and will be run through envsubst. Config files
are no longer symlinked to the home directory but rather copied directly. This
allows host-specific changes without causing conflicts with the dotfiles
repository.
Add .octaverc
Updated .screenrc
Fix display bug in old screenrc hard status

Added a commented-out, fixed version of the previous screen hard status.
Merge branch 'master' of github.com:bsidhom/dotfiles
Merge remote-tracking branch 'origin/master'