Merge pull request #5 from 11693-01/master

pull newest
Merge pull request #6 from 11693-01/master

pull final
for zhou chen
Merge pull request #39 from yanyankangkang/master

for zhou chen
fix bugs in retrieval measures
Merge pull request #7 from 11693-01/master

get from zhou chen
fix bugs
Merge pull request #8 from 11693-01/master

fix bugs
fix reader bug question1
Merge pull request #40 from yanyankangkang/master

fix bugs reader
Merge pull request #3 from 11693-01/master

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