Restructuring of the project

[giladreich]

One Dockerfile to do it all!

See README.md for further details about this update.

Given that the project is under the GPL-v3 License, I created this PR for you to consider merging to master.

Main motivation behind this; so people who want to learn Angr don't have to go through a long process of installing dependencies and making sure they get it right. Having this current setup in place they can get started with these wonderful CTFs in a minute regardless of the platform they're currently working on.

In case you wonder about the previous modified commits, it's because I removed the dist directory from history to reduce the repository size.

Let me know if you have any questions. I would be happy to help.