fixed null error during getting desciption
fixed error in sumarizing
removed total commit count in description of footer

* because it cause overhead unnucessary
* it is not meaningful.
implicit text only script is deprecated in jade v0.31.0
added moment to compute date
compact data when store summarized score

* merge data into data of same day
* so, only one data for specific language each day
removed cache for score and mapreduce when find score by lang

* becauce score data is already merged into one row
added example code for static final #26
changed mongodb collection name

* because I have to aggregate data newly.
* new data structure is not competible with old one.
* and the service are operating based on old code.