Code cleaning and fix label of plots.

1. Add scripts "MakePlot.py" 
   - Include "usage".
1. Add function to calculate efficiency plots.
   - TProfile and TH1 can not provide Asymmetry error. So, this function return "large error".
   - I will input this function to MakePlot.py
1. Fix label "station2"->"station2_short" and "station3"->"station2_long"