Added implementation for question showing.
Merge branch 'developing' of https://github.com/ifLab/WeCenterMobile-iOS into developing
Added implementation for question/answer view controller. (There are several bugs in question view controller.)
Moved to Swift 1.0 syntax. Many bugs have been fixed.
Solved the issue of no contents in QuestionViewController. View generating codes in view controllers have been moved from init() to loadView()
Merge pull request #4 from ifLab/developing

Developing