Add blog for using ethpm & truffle

[njgheorghita]

Tutorial style blog for how to use ethpm & truffle.

[eggplantzzz]

I went ahead and added a necessary json snippet, rebased, and went through the installation portion of the tutorial here. Looks good but I had a couple of comments that I think would make this smoother.

1. You may want to point out that it is necessary to have a ropsten configuration to use this. The error does not make the solution completely obvious when you don't have it configured.
2. You may also want to note that you need ENS enabled. Relevant docs are here.
3. The erc20 package that you reference in the install section does not work out of the box so I would think that you should use the safe-math package (or some other alternative that works) which worked for me when I went through.

So I think we're on track for releasing this Wednesday! Let me know about the above.

[eggplantzzz]

Oh also do note that I force pushed so you'll have to sync your branch back up! Sorry, I probably should have just merged it in.

[njgheorghita]

@eggplantzzz Thanks for the review & feedback! What exactly was wrong with the erc20 package. Was there trouble installing it or using it?

[eggplantzzz]

@njgheorghita It will not install. Here is a screenshot of what I get

And like I said, the safe-math library is the next one I tried on a whim and it seemed to install correctly.

Oh, and I realized I said Wednesday but it looks like it will be Thursday.

[njgheorghita]

@eggplantzzz Thanks for the output. It looks like I linked the incorrect registry inside the truffle-config.js. Would you mind testing this one more time? erc20-example is a much better example of what's possible rather than safe-math. I've updated all of the examples in the sample truffle-config to be equal to their default values. You should be able to install erc20-example with or without the sample truffle-config ethpm settings.

[DiscRisknBisque]

@eggplantzzz Is this good to go?

[eggplantzzz]

Not yet @DiscRiskandBisque, we are going to wait until releasing 5.2.0 which is kind of in a holding pattern right now. I'll get back to you here when it is ready to roll out. Thanks!

[eggplantzzz]

Integrating this with the ethpm docs PR and continuing this here