Updated the website

Note of all changes:

**Changed events section**
- Added Tech Talk
- Added hackChallenge
- Fixed carousel indicator positioning
- Removed listed events

**Changed positions & titles**
- Changed Nik to Senior Committee Member
- Changed Sanyia to Social Media Representative Representative
- Changed Chrystel to Committee Member
- Commented out James Bellamy (Find: Thor)
- Added Mustafa: Committee Member
- Added Mark: Committee Member