Adapting display according to kind of screen computer or smartphonetablet

[ofaurax]

Fixes #11

[kimicol]

2 comments for computer screen display:

• When there are a lot of scores, there are not aligned
  

• For one score, label of items could be added
  
  Example here: "Compositeur : Beethoven, Arrangeur : Levasseur, Classification : F058"
  It would add clarity but it is not pretty, not sure what to chose.

[ofaurax]

When there are a lot of scores, there are not aligned
image

What would be the desired behaviour?

label of items could be added

The whole box should be rethought:

• youtube/musicainfo links should be elsewhere
• identifier (Letter + 3 digits) doesn't need to be shown this big
• Download link can be prettier

But perhaps this can be done in another branch, so we already provide something usable, before something pretty

[ofaurax]

OK, so I put a "fixed" width (proportional to fixed font-size), it should be well-aligned now