Added documentation for new areNotificationsEnabled function. (#181)

* getSelection documentation added

* fixed textbox docs

I've added this before accidentally, it's only available for textField, not textBox.

* fix

* added getSelection doc to textBox

* formating fix

* fix

* Added documentation to new areNotificationsEnabled function.

* clean

Author: DimaUndSo

markdown/plugin/notifications-v2/areNotificationsEnabled.markdown

@@ -0,0 +1,27 @@
+# notifications.areNotificationsEnabled()
+
+> --------------------- ------------------------------------------------------------------------------------------
+> __Type__				[Function][api.type.Function]
+> __Return value__		none
+> __Revision__			[REVISION_LABEL](REVISION_URL)
+> __Keywords__			notification, notifications, areNotificationsEnabled
+> __See also__			[notifications.*][plugin.notifications-v2]
+> --------------------- ------------------------------------------------------------------------------------------
+
+
+## Overview
+
+Checks whether push notifications are enabled for the app on the device. Works for iOS and Android.
+Returns true if notifications are enabled, false otherwise.
+
+## Syntax
+
+	notifications.areNotificationsEnabled()
+
+## Example
+
+``````lua
+local notifications = require( "plugin.notifications.v2" )
+
+local enabled = notifications.areNotificationsEnabled()
+``````

markdown/plugin/notifications-v2/index.markdown

@@ -50,6 +50,8 @@ To use Firebase notifications on iOS make sure to include `plugin.notifications.
 
 #### [notifications.registerForPushNotifications()][plugin.notifications-v2.registerForPushNotifications]
 
+#### [notifications.areNotificationsEnabled()][plugin.notifications-v2.areNotificationsEnabled]
+
 
 ## Project Settings