Fix config

Fixed the config in tests and sample data to avoid a trimming issue.

Usage examples and fix tests

Fix the tests!

Update usage examples.

Build windows with .exe

Update Makefile to build windows binary with .exe.

Add samples

Sample input file, input csv configuration and input json config.

Optional CSV configuration file

Use the -csv flag to specify that the config file is a CSV. If so, the -c flag must also be provided with a file name, since the default configuration file is config.json.

Initial release

Usage: fixedtocsv [-c] [-d] [-f] [-o]
        Options:
          -h | --help  help
          -c           input configuration file (default: "config.json" in current directory)
          -d           output delimiter (default: comma ",")
          -f           input file name (Required)
          -o           output file name (default: "output.csv" in current directory)