Create CONTRIBUTING.md

Github suggested I add this, so why not

CONTRIBUTING.md

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+# Welcome to [kbtui](https://keybase.io/team/kbtui)! 
+An application for those who want to use Keybase, but don't want to leave the comfort of their terminal. 
+
+## Basic Rules
+Thank you for taking the time to contribute to this project! There are two main rules:
+* Don't be rude
+* Keep it simple, stupid
+
+There is nothing to be gained by being rude anywhere; contributions to this project are no different. 
+Also when in doubt, simplify everything. There are other people who are reading, forking, and working on this project. 
+See the style guidelines below in the [Getting Started](#getting-started) section.
+
+## Pull Requests
+In order for a PR to be accepted it must be two things:
+* Reviewed by [@dxb](https://keybase.io/dxb) or [@rudi9719](https://keybase.io/rudi9719)
+* Consistent with the Go formatting guidelines below.
+
+# Getting Started!
+Please read through [Effective Go](https://golang.org/doc/effective_go.html]) and [Style guidelines for go](https://rakyll.org/style-packages/).
+If you're having difficulties getting started I suggest you try to [learn go with tests](https://quii.gitbook.io/learn-go-with-tests).
+
+It might also help to read the godoc for [@dxb's Keybase framework](https://godoc.org/samhofi.us/x/keybase),
+as well as the godoc for [gocui](https://godoc.org/github.com/awesome-gocui/gocui), the library we're using for the TUI.
+Please note, we're using the awesome-gocui version of gocui.
+
+
+