Add documentation for LocalPackage and RemotePackage

Author: Will Anderson

README.md

@@ -67,3 +67,37 @@ Running Tests
 * Navigate to the test explorer (small grey diamond near top left)
 * Click on the 'play' button next to CodePushDemoAppTests
 * After the tests are completed, green ticks should appear next to the test cases to indicate success
+
+
+## LocalPackage
+Contains details about an update package that has been downloaded locally or already applied (currently installed package).
+### Properties
+- __deploymentKey__: Deployment key of the package. (String)
+- __description__: Package description. (String)
+- __label__: Package label. (String)
+- __appVersion__: The native version of the application this package update is intended for. (String)
+- __isMandatory__: Flag indicating if the update is mandatory. (Boolean)
+- __packageHash__: The hash value of the package. (String)
+- __packageSize__: The size of the package, in bytes. (Number)
+
+### Methods
+- __apply(applySuccess, applyError, rollbackTimeout)__: Applies this package to the application. The application will be reloaded with this package and on every application launch this package will be loaded.
+If the rollbackTimeout parameter is provided, the application will wait for a codePush.notifyApplicationReady() for the given number of milliseconds.
+If codePush.notifyApplicationReady() is called before the time period specified by rollbackTimeout, the apply operation is considered a success.
+Otherwise, the apply operation will be marked as failed, and the application is reverted to its previous version.
+
+## RemotePackage
+Contains details about an update package that is available for download.
+### Properties
+- __deploymentKey__: Deployment key of the package. (String)
+- __description__: Package description. (String)
+- __label__: Package label. (String)
+- __appVersion__: The native version of the application this package update is intended for. (String)
+- __isMandatory__: Flag indicating if the update is mandatory. (Boolean)
+- __packageHash__: The hash value of the package. (String)
+- __packageSize__: The size of the package, in bytes. (Number)
+- __downloadUrl__: The URL at which the package is available for download. (String)
+
+### Methods
+- __download(downloadSuccess, downloadError)__: Downloads the package update from the Code Push service. The ```downloadSuccess``` callback is invoked with a ```LocalPackage``` argument, representing the downloaded package.
+