docs: Update iOS Linking information (#61)

After the discussions on issue #56 I've noticed that we have missing information about iOS Linking and almost none about the manual linking process, this PR aims to provide this missing info.

Author: clucasalcantara

README.md

@@ -16,6 +16,11 @@ $ react-native link @react-native-community/async-storage
 
 See docs for [manual linking guide.](docs/Linking.md)
 
+**Note:** For iOS project using `pods`, run:
+	```
+	$ cd ios/ && pod install
+	```
+
 
 ## Usage
 
@@ -66,4 +71,4 @@ See the [CONTRIBUTING](CONTRIBUTING.md) file for how to help out.
 
 ## License
 
-MIT
+MIT

docs/Linking.md

@@ -2,6 +2,27 @@
 
 ## iOS
 
+#### Project linking
+1. Open your project `.xcodeproj` on xcode.
+
+2. Right click on the Libraries folder and select `Add files to "yourProjectName"`.
+
+3. Add `RNCAsyncStorage.xcodeproj` (located at `node_modules/@react-native-community/async-storage/ios`) to your project Libraries.
+
+3. Go to `Build Phases -> Link Binary with Libraries` and add:  `libRNCAsyncStorage.a`.
+
+#### Using 'Pods'
+1. Enter into iOS Folder `cd ios/` (on your project's root folder).
+
+2. Add this line to your `Podfile` just below the last pod: (if you don't one just create a new runnning: `pod init`).
+
+```diff
++ pod 'react-native-async-storage', :path => '../node_modules/@react-native-community/async-storage'
+```
+
+3. Run `pod install`
+
+
 ## Android
 1. Add project to `android/settings.gradle`:
 ```diff