Merge pull request #158 from chuongle/master

Fix incorrect permission name.

index.android.js

 	event: RNPermissions.PERMISSIONS.READ_CALENDAR,
 	storage: RNPermissions.PERMISSIONS.READ_EXTERNAL_STORAGE,
 	photo: RNPermissions.PERMISSIONS.READ_EXTERNAL_STORAGE,
-	call_phone: RNPermissions.PERMISSIONS.CALL_PHONE,
+	callPhone: RNPermissions.PERMISSIONS.CALL_PHONE,
 	readSms: RNPermissions.PERMISSIONS.READ_SMS,
 	receiveSms: RNPermissions.PERMISSIONS.RECEIVE_SMS,
 }