Screwmeter V2 - Screws mesure tool

Hi friends,

I made a new version of my blockbuster screwmeter ;) https://www.thingiverse.com/thing:2624098

Here are the changes:
- I added new sizes: 4 and 5 mm
- Because of these new sizes, I had to rework the slider more accurately to have a good precision. I suggest you to put soap on it before using it.
- I reduced the thickness on a large part of the principal bloc. Less filament is needed and printing is faster.
- I integrated the idea of J-Max. Now, the slider has holes for 2.5