Merge pull request #3 from hoanguyen311/master

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Merge pull request #4 from hoanguyen311/master

Update data
Merge pull request #13 from tuyetle/master

update filter category
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Merge pull request #14 from tuyetle/master

update
Modified   app/index.html
Modified   app/scripts/controllers/question-list-controller.js
Modified   app/scripts/services.js
Modified   app/views/questions-list.html
Added      app/styles/custom.css
Modified   app/index.html
Modified   app/index.html
Modified   app/views/questions-list.html
Modified   app/styles/custom.css
Modified   app/views/questions-list.html
Merge pull request #5 from hoanguyen311/master

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