Adding Writeups for Capture the Ether Challenges

[Enigmatic331]

First PR on this repo, please be gentle. :)

As titled - Adding two writeups I have done for the Capture the Ether challenges.
Working on the third part and should be done in a week or so.

Thanks!
PS: Will eventually port over the writeups to Medium as well once I'm done with all three.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[Enigmatic331]

Completed all four writeups (instead of three), and posted them on Medium. Pull request now has updated Medium links.

[dguido]

Thanks! I have been out sick, but I'll review these tomorrow.