Give PineAPPL a Logo

[Radonirinaunimi]

Given that the logo design is at a somehow mature stage, this PR adds it to the repository.

To do:

• color the PineAPPL to yellow-/orange-ish

To see the current upstream logo, see the README.

[Radonirinaunimi]

Coloring the word PineAPPL to light yellow doesn't really look good, unless we (perhaps) also color the outer stroke. Dark yellow/orange-ish also doesn't look much better (?)

I'd personally think that the previous dark-grey color looks better. But in any case, @cschwan, if you want to play with the color, you can edit the pineappl-logo.svg in the following part:

  <text
     id="svg_21"
     fill="#FFDD44"
     stroke="#374151"
     font-weight="bold"
     font-size="20px"
     font-family="'Klavika'"
     text-anchor="middle"
     y="85.866478"
     x="59.955414"
     style="stroke-width:0.5">PineAPPL</text>

where stroke controls the outer line color and fill the filling.

[cschwan]

I actually meant the pineapple, which I want a bit more yellow-ish, not the 'PineAPPL' string 😄; I want to color to more reminiscent of the actual fruit! I think having black characters is OK.

[Radonirinaunimi]

hahaha, I completely misunderstood then 🙈

Here are some variations (#ffaa00, #ffcc00, #ffdd00, #ffff00):

[cschwan]

I'm torn between the first and the second one. Can you put the text a few pixels lower and maybe also lower the font size a bit, it looks a bit off.

[t7phy]

I personally like the 1st one the most. that slight orange hue seems the closest to the real thing.

[Radonirinaunimi]

I also have a slight preference for the first one. I will implement the changes proposed by @cschwan for the first two and then we can make a final choice.

[felixhekhorn]

Can we merge this before QCD@LHC in two weeks? 😇 I'd like to have a slide stressing our open source framework - for which we agreed to put more propaganda

[Radonirinaunimi]

Can we merge this before QCD@LHC in two weeks? 😇 I'd like to have a slide stressing our open source framework - for which we agreed to put more propaganda

Yes! I delayed this a bit to wait for the PineAPPL v1 paper 😇 but given that reason I'll try to wrap this up ASAP.