format README

README.md

@@ -7,7 +7,9 @@ Here you have:
   1) a c# dll wrapper, meaning the passage from unmanaged to managed code, in https://github.com/giuliohome/xgboost/tree/master/windows/xgboost_sharp_wrapper
   
   2) the c# Higgs Kaggle demo, instead of the python one (actually you will get a higher score with the c# version, due to some changes I've made) in https://github.com/giuliohome/xgboost/tree/master/windows/kaggle_higgs_demo
+  
   Start the demo from the root folder like this: 
+  
   bin\x64\Debug\kaggle_higgs_demo.exe training_path.csv test_path.csv sharp_pred.csv NFoldCV
   
   NFoldCV: 0 => no cv , 5 = 5-fold-cv, 10 = 10-fold-cv :-)