Refactoring needed - Cleanup of project structure and specific code

[mding5692]

Cleanup of project structure and specific code

• Project Structure is confusing: Copied off github pages template and thus needs basic refactoring (stylesheets folder put into css folder, etc.)
• Specific code: Some parts have comments or confusing comments or the code itself needs to be optimized
• Priority: Medium

Post under here to say which code has been changed or need to be changed!