Added full HTTP Response code list

[montogeek]

Implements #25 Using https://developer.mozilla.org/en/docs/Web/HTTP/Response_codes as reference.

Some suggestions:

• It would be good to move all response codes to other static file that just export them.
• Why the HTTP Numeric code is inside the label key? We could remove it from the label and construct a new label when listing it: ${responseCode.code} ${responseCode.label}

Bugs: Component src/client/components/Header.jsx is importing a module called file-saver that does not exist in package.json, although Webpack throws an error when compiling the final bundle is fine and the application loads, FileSaver is not used in the component, but there is a constructor of FileReader maybe you forgot to update it or something :)

[Raathigesh]

Thanks for the PR :) I created a separate issue to keep track of your suggestions. Will address them soon.

The FileReader constructor is browser's file reader's constructor.