fcm make: arguments as extra configurations

Each command line argument is considered a declaration line to append to the
configuration file.
test: fcm make options args
fcm make: extract: fix ssh location efficiency

Use file modified time instead of checksum.
Ignore hidden files.
Merge pull request #98 from matthewrmshin/fcm-make-extract-ssh-efficiency

fcm make: extract: fix ssh location efficiency
Merge pull request #96 from matthewrmshin/fcm-make-args

fcm make: arguments as extra configurations