use latest fb android sdk

android/AndroidManifest.xml

@@ -7,7 +7,6 @@
       <application>
       		<activity android:name="com.facebook.FacebookActivity"
           				android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
-          				android:theme="@android:style/Theme.Translucent.NoTitleBar"
           				android:label="@string/app_name" />
 
       		 <!-- <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>-->

android/build.gradle

@@ -18,7 +18,7 @@ apply plugin: 'com.android.library'
 
 dependencies {
         compile(project(':oxygine-extension'))
-        compile 'com.facebook.android:facebook-android-sdk:4.15.0'
+        compile 'com.facebook.android:facebook-android-sdk:4.+'
 }
 
 android {

src/sim/FacebookSimulator.cpp

@@ -16,11 +16,11 @@ string _appID = "";
 
 Json::Value _facebook(Json::objectValue);
 
-std::string getValue(const Json::Value &obj, const char *key);
+std::string getValue(const Json::Value& obj, const char* key);
 static void save()
 {
     _facebook["loggedIn"] = _isLoggedIn;
-    
+
     Json::StyledWriter writer;
     string s = writer.write(_facebook);
     file::write(".facebook", s.c_str(), s.size());
@@ -176,7 +176,7 @@ void facebookSimulatorLogout()
     save();
 }
 
-std::string getValue(const Json::Value &obj, const char *key)
+std::string getValue(const Json::Value& obj, const char* key)
 {
     if (obj[key].empty())
         return "";