Design changes with fix for issue#1

Resolves #2

See merge request brian/mymusiclist!4

- Added mockup of sidebar with songs
- Refactoring css code for more readability
- Minor design changes

Design changes

Closes #1

See merge request brian/mymusiclist!3

>Fixes issue #1
>Small design changes

Added style to navbar and body text

See merge request brian/mymusiclist!2

Adds preliminary design and static file loading support

See merge request brian/mymusiclist!1

Add static files in mymusiclist/files/ and load them by using {% static [file path starting at /files]%}