upd readme for android

readme/Android.txt

@@ -10,7 +10,6 @@ How to build. Steps:
 - Install Android NDK (https://developer.android.com/tools/sdk/ndk/index.html) and set it up
 - Install Android SDK Tools (https://developer.android.com/intl/ru/sdk/index.html#Other), 
   Launch SDK Manager and install Android SDK v16
-- Install apache-ant (http://ant.apache.org/bindownload.cgi)
 
 - Configure environment variables properly:
   NDK_ROOT points to root NDK folder 
@@ -23,8 +22,6 @@ How to build. Steps:
 - Add necessary paths to environment variable PATH:
   JDK 
   	example: "c:\Program Files (x86)\Java\jdk1.6.0_26\bin\"
-  apache-ant
-  	example: d:\android\apache-ant\bin\
   NDK tools 
   	example: d:\android\android-ndk-r9c\
   Android SDK tools and platform-tools
@@ -36,15 +33,21 @@ How to build. Steps:
 	to oxygine-framework/oxygine/SDL/android/lib/src/
 
 - Go to oxygine-framework\examples and choose any example. For example "Demo" 
-- Try to build and run it using these scripts located in proj.android folder*:
-  - build native part:
-      build.cmd
-  - build complete application in debug mode:
-      ant_debug.bat
-  - install it to device and run (using adb):
-      install.bat
+- Try to build and run it using shell/batch scripts located in proj.android folder*:
+  - build-run.bat   
+    * or ./build-run.sh for unix
+
+  	build-run.bat includes 4 steps:
+	1. build C++ code using android-ndk:
+		ndk-build NDK_MODULE_PATH=../../../../
+	2. build android aplication using gradle and android-sdk:
+		gradlew assembleDebug
+	3. intall android application to connected android device:
+		adb install -r build/outputs/apk/proj.android-debug.apk
+	4. run installed application on android:
+		adb shell am start -n org.oxygine.Demo/org.oxygine.Demo.MainActivity
+	* if you have any problems with build check each step manually
 
-  * there is also build-run.bat includes these 3 steps
   
 
 !!!note!!!: