Web UI/ux

[damlakayikci]

Hey guys! On this branch, I made the following modifications:

• Redesigned how questions look on feed and on language info page
• Separated language tag and other tags in question box and made language tag clickable
• Modified upvoting functionality (to be modified again later, due to some technical issues with git, it is not finished yet)
• Added filtering functionality for the questions on feed, like filter by language and answered/unanswered status
• Modified some of the backend files to satisfy front end needs

[Mutti499]

Okey it is time to goo!