Improve default evaluation setting

[arjenpdevries]

Address evaluation metrics to be reported on all topics (-c flag),
re: #105

And, report P@5 by default, just like the "official" evaluation at OSIRRC 2019.

[lintool]

@arjenpdevries I'll let @r-clancy look at this in case he's in the middle of something else.

[ryan-clancy]

I'll merge this, but for the rest of the official run through I'll keep P@30 in my local copy of jig so I can confirm P@30 numbers (which is what most people have in their README now).

[lintool]

@arjenpdevries would you be willing to change over to P@30 in OldDog to be consistent with others? The primary metrics we've decided on is NDCG@20, AP, and P@30, IIRC...

[arjenpdevries]

Definitely!
@chriskamphuis can you update the table with the P@30 scores?

[chriskamphuis]

After this merge we will find other values because of -c flag. I will update the values to those found when running with the -c flag.

[arjenpdevries]

Probably should only merge the - c modification then?
Shall I revert the P. 5 and reopen another pull request?

[ryan-clancy]

Probably should only merge the - c modification then?
Shall I revert the P. 5 and reopen another pull request?

Yeah, let's just do the -c change for now.

[arjenpdevries]

Ok 👌 later tonight