CB-12034 (ios) Add mandatory iOS 10 privacy description

 This closes #119

Author: jcesarmobile

README.md

@@ -312,7 +312,7 @@ function recordAudio() {
 
     // Pause Recording after 5 seconds
     setTimeout(function() {
-        my_media.pauseRecord();
+        mediaRec.pauseRecord();
     }, 5000);
 }
 ```
@@ -427,12 +427,12 @@ function recordAudio() {
 
     // Pause Recording after 5 seconds
     setTimeout(function() {
-        my_media.pauseRecord();
+        mediaRec.pauseRecord();
     }, 5000);
 
     // Resume Recording after 10 seconds
     setTimeout(function() {
-        my_media.resumeRecord();
+        mediaRec.resumeRecord();
     }, 10000);
 }
 ```
@@ -563,6 +563,14 @@ function recordAudio() {
 
         var myMedia = new Media("documents://beer.mp3")
 
+- Since iOS 10 it's mandatory to add a `NSMicrophoneUsageDescription` entry in the info.plist.
+
+`NSMicrophoneUsageDescription` describes the reason that the app accesses the user’s microphone. When the system prompts the user to allow access, this string is displayed as part of the dialog box. To add this entry you can pass the variable `MICROPHONE_USAGE_DESCRIPTION` on plugin install.
+
+Example: `cordova plugin add cordova-plugin-media --variable MICROPHONE_USAGE_DESCRIPTION="your usage message"`
+
+If you don't pass the variable, the plugin will add an empty string as value.
+
 ### Windows Quirks
 
 - Windows devices can use MP3, M4A and WMA formats for recorded audio. However in most cases it is not possible to use MP3 for audio recording on _Windows Phone 8.1_ devices, because an MP3 encoder is [not shipped with Windows Phone](https://msdn.microsoft.com/en-us/library/windows/apps/windows.media.mediaproperties.mediaencodingprofile.createmp3.aspx).

plugin.xml

@@ -59,7 +59,7 @@ id="cordova-plugin-media"
         <source-file src="src/android/AudioHandler.java" target-dir="src/org/apache/cordova/media" />
         <source-file src="src/android/AudioPlayer.java" target-dir="src/org/apache/cordova/media" />
         <source-file src="src/android/FileHelper.java" target-dir="src/org/apache/cordova/media" />
-     </platform>
+    </platform>
 
      <!-- amazon-fireos -->
     <platform name="amazon-fireos">
@@ -79,31 +79,35 @@ id="cordova-plugin-media"
         <source-file src="src/android/AudioHandler.java" target-dir="src/org/apache/cordova/media" />
         <source-file src="src/android/AudioPlayer.java" target-dir="src/org/apache/cordova/media" />
         <source-file src="src/android/FileHelper.java" target-dir="src/org/apache/cordova/media" />
-     </platform>
-
-
-     <!-- ubuntu -->
-     <platform name="ubuntu">
-         <config-file target="config.xml" parent="/*">
-             <feature name="Media">
-                 <param policy_group="microphone" policy_version="1" />
-                 <param policy_group="video" policy_version="1" />
-             </feature>
-         </config-file>
-         <header-file src="src/ubuntu/media.h" />
-         <source-file src="src/ubuntu/media.cpp" />
-     </platform>
-
-     <!-- ios -->
-     <platform name="ios">
-         <config-file target="config.xml" parent="/*">
-             <feature name="Media">
-                 <param name="ios-package" value="CDVSound" />
-             </feature>
-         </config-file>
-         <header-file src="src/ios/CDVSound.h" />
-         <source-file src="src/ios/CDVSound.m" />
-     </platform>
+    </platform>
+
+
+    <!-- ubuntu -->
+    <platform name="ubuntu">
+        <config-file target="config.xml" parent="/*">
+            <feature name="Media">
+                <param policy_group="microphone" policy_version="1" />
+                <param policy_group="video" policy_version="1" />
+            </feature>
+        </config-file>
+        <header-file src="src/ubuntu/media.h" />
+        <source-file src="src/ubuntu/media.cpp" />
+    </platform>
+
+    <!-- ios -->
+    <platform name="ios">
+        <config-file target="config.xml" parent="/*">
+            <feature name="Media">
+                <param name="ios-package" value="CDVSound" />
+            </feature>
+        </config-file>
+        <header-file src="src/ios/CDVSound.h" />
+        <source-file src="src/ios/CDVSound.m" />
+        <preference name="MICROPHONE_USAGE_DESCRIPTION" default=" " />
+        <config-file target="*-Info.plist" parent="NSMicrophoneUsageDescription">
+            <string>$MICROPHONE_USAGE_DESCRIPTION</string>
+        </config-file>
+    </platform>
 
     <!-- blackberry10 -->
     <platform name="blackberry10">