Merge pull request #19 from Gaoyuan0710/gh-pages

add some questions on August 2nd
增加 Java Concurrency In Practice

Signed-off-by: hurley25 <liuhuan1992@gmail.com>
修改错别字
删掉副标题..反正也没几个人做....
Merge pull request #7 from hurley25/gh-pages

update for change