Adds a CLI to docopt_c.py
Changes legal notice to a simples reference
Reads template if this is provided via '--template' in CLI
Fixes exit_on_exception with sys.error
Moves shegang to the first line
Removes comment explaining sys.stdin.read()
Changes variable name of hardcoded template to TEMPLATE_C
Updates docopt string to up coming conventions in usage pattern
Merge pull request #6 from ffunenga/feature/create-cli

Adds a CLI to docopt_c.py