add feature check maximum score in submission ranges
available in the [result] admin menu.
A user can enter a range of submissions id and the maximum score per each user,problem
among the submission ranges will be reported

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branch : algo
forgot to add two more files

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branch : algo
update gemfile

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branch : java
add 2nd level sort problem by name (not full name)
show problem name before full_name in main/list

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branch : java
add login stat

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branch : java
merge max score from branch algo

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branch : java