Add README.md

### Steps to Use ###

1.  Use following pod profile:

      pod ‘Leegality’, :git => ‘http://gitlab.leegality.com/leegality-public/ios-sdk.git’, :tag => ‘1.0.0’

2. To initialize signing process, follow the below steps:

	<br __>2.1 Import Leegality on the top of the class

	<br __>2.2 Extend LeegalityProtocol in your ViewController class to get the response as result.

    <br __>2.3 Create getResult method of LeegalityProtocol as shown below

    <br __>Eg.:`func getResult(value: [String : String]) {

            //your code here

            print(value)

        }`

	<br __>2.4 To start the signing process, follow the below code

	<br __>Eg.:`let controller = Leegality()

        controller.delegate = self

        controller.url = "your-signing-url"

        self.present(controller, animated: true, completion: nil)`

### Result: ###

1. In case of successfully completion of signing process, signing window will be closed automatically and you will get a response with key name 'message' and corresponding 'success message' in the getResult method.

2. In case of error in signing process, signing window will be closed automatically and you will get a response with key name 'error' and corresponding 'error message'.