Added two new options --options.input and --options.output
Overriding --options.output and --options.input if passed through command arguments
Removed parsing config file data here as it is pre-parsed and values are overriden before loading lib.js
Replaced single quotes with double quotes
Hyphen-separate command line arguments for `options` 

`--options-input` reads better than `--options.input` from a CLI tool perspective.
Parse hyphen-separated arguments from commandline
Merge pull request #6 from fusioncharts/feature/options-from-cli

Add CLI flags for parsing input and output options