Added readme.txt to android and ios runtime nuget package.

CMakeLists.txt

@@ -1403,7 +1403,8 @@ IF(HAVE_ANDROID_ALL_ARCH AND WIN32)
     SET(EMGUCV_ANDROID_NUGET_FILE_LIST "${EMGUCV_ANDROID_NUGET_FILE_LIST} 
     <file src=\"Emgu.CV.runtime.android.targets\" target=\"build\\${EMGUCV_ANDROID_NUGET_ID}.targets\" />
     <file src=\"..\\..\\..\\miscellaneous\\nuget_icon.png\" target=\"icon.png\" />
-    <file src=\"..\\..\\..\\${EMGUCV_LICENSE_FILE}\" target=\"\" />")
+	<file src=\"..\\..\\..\\${EMGUCV_LICENSE_FILE}\" target=\"\" />
+    <file src=\"readme.txt\" target=\"\" />")
     SET(EMGUCV_ANDROID_NUGET_DEPENDENCY "
     <dependencies>
       <group targetFramework=\"MonoAndroid5.0\">
@@ -1421,7 +1422,8 @@ IF(HAVE_IOS AND WIN32)
     SET(EMGUCV_IOS_NUGET_FILE_LIST "${EMGUCV_IOS_NUGET_FILE_LIST} 
     <file src=\"Emgu.CV.runtime.ios.targets\" target=\"build\\${EMGUCV_IOS_NUGET_ID}.targets\" />
     <file src=\"..\\..\\..\\miscellaneous\\nuget_icon.png\" target=\"icon.png\" />
-    <file src=\"..\\..\\..\\${EMGUCV_LICENSE_FILE}\" target=\"\" />")
+    <file src=\"..\\..\\..\\${EMGUCV_LICENSE_FILE}\" target=\"\" />
+	<file src=\"readme.txt\" target=\"\" />")
     SET(EMGUCV_IOS_NUGET_DEPENDENCY "
     <dependencies>
       <group targetFramework=\"Xamarin.iOS10\">

Emgu.CV.Contrib/BgSegm/BackgroundSubtractorCNT.cs

@@ -91,6 +91,6 @@ namespace Emgu.CV.BgSegm
             ref IntPtr sharedPtr);
 
         [DllImport(CvInvoke.ExternLibrary, CallingConvention = CvInvoke.CvCallingConvention)]
-        internal static extern void cveBackgroundSubtractorCNTRelease(ref IntPtr bgSubstractor, ref IntPtr sharedPtr);
+        internal static extern void cveBackgroundSubtractorCNTRelease(ref IntPtr bgSubtractor, ref IntPtr sharedPtr);
     }
 }

Emgu.CV.Platform/iOS/CvInvokeIOS.cs

@@ -29,7 +29,7 @@ namespace Emgu.CV
         /// </summary>
         public static bool Init()
         {
-            return CvInvoke.Init();
+            return _libraryLoaded;
         }
 
         /// <summary>

platforms/nuget/Emgu.CV.runtime.android/readme.txt

@@ -0,0 +1,3 @@
+## Setup
+
+Please make sure to call Emgu.CV.CvInvokeAndroid.Init() before making any other calls to Emgu CV library on Android.

platforms/nuget/Emgu.CV.runtime.ios/readme.txt

@@ -0,0 +1,3 @@
+## Setup
+
+Please make sure to call Emgu.CV.CvInvokeIOS.Init() before making any other calls to Emgu CV library on iOS.