Fix errors trying to read missing files

Trying to read in files that don't exist creats errors. This is
generally only true just after first install. We can simply wait to read
the files until after they exist.
Merge pull request #145 from nickanderson/cleanup/errors_reading_missing_files

Fix errors trying to read missing files
not to run cf-twin by cf-execd
Merge pull request #146 from phnakarin/fix#nottoruncftwin

not to run cf-twin by cf-execd