Added readme and licence files

Author: mcousillas6

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2017 XMARTLABS
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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-# WIP
-## React native LINE
+# React native LINE
+iOS and Android Native wrapper for Line's MobileSDK.
+
+## Requirements
+- React native `0.48.+`.
+- LineSDK iOS `4.0.3` and Android `4.0.6`.
+
+## Installation
+First, install the npm package and link it to your Android and iOS projects with react-native link.
+```bash
+  yarn add react-native-line
+  react-native link react-native-line
+```
+### iOS Setup
+Follow all the configuration steps in [Line's iOS integration guide](https://developers.line.me/en/docs/line-login/ios/integrate-line-login/)
+
+### Android Setup
+1. Follow all the configuration steps in [Line's Android integration guide](https://developers.line.me/en/docs/line-login/android/integrate-line-login/)
+2. Add the string `line_channel_id` to your strings file with the the channel id that you have on your line console.
+```xml
+<string name="line_channel_id">Your channel id here</string>
+```
+3. Download the line Android SDK [here](https://developers.line.me/en/docs/line-login/downloads/) and save it on a new folder named `libs` under your `app` folder on your android project.
+4. Add the following to your app's build.gradle:
+```gradle
+repositories {
+    flatDir {
+        dirs 'libs'
+    }
+}
+```
+
+## Usage
+First, require the `LineLogin` module:
+```javascript
+import LineLogin from 'react-native-line'
+```
+Then, you can start using all the functions that are available:
+
+1. `login = () => Promise<{Profile, AccessToken}>`: Starts the login flow of Line's SDK (Opens the apps if it's installed and defaults to the browser otherwise.)`
+
+2. `loginWithPermissions = (permissions) => Promise<{Profile, AccessToken}>`: **iOS ONLY** Works as the `login` function but you can provide custom permissions settings.
+
+3. `currentAccessToken = () => Promise<AccessToken>`: Returns the current access token for the currently logged in user.
+
+4. `getUserProfile = () => Promise<Profile>`: Returns the profile of the currently logged in user.
+
+5. `logout = () => Promise<Void>`: Logs out the currently logged in user.
+
+Example:
+```javascript
+  LineLogin.login()
+    .then((user) => {
+      console.log(user.profile.displayName)
+    })
+    .catch((err) => {
+      console.log(err)
+    })
+```
+
+### Return values
+The following objects are returned on the methods described above:
+1. Profile:
+```typescript
+{
+  displayName: String,
+  userID: String,
+  statusMessage: String,
+  pictureURL: String?,
+}
+```
+2. AccessToken:
+```typescript
+{
+  accessToken: String,
+  expirationDate: String,
+}
+```
+
+## Example
+To see more of `react-native-line` in action you can check out the source in the `example` folder.
+
+## Authors
+- [Santiago Fernandez](https://github.com/santiagofm)
+- [Mauricio Cousillas](https://github.com/mcousillas6)
+
+## License
+`react-native-line` is available under the MIT license. See the LICENCE file for more info.