docs(README): Change contributor link (#685)

Merge pull request #685 from il-dar/master

README.md

@@ -21,7 +21,7 @@
   Packages
  </a>
  <span> | </span>
- <a href="https://github.com/qri-io/qri/blob/master/.github/CONTRIBUTING.md">
+ <a href="https://github.com/qri-io/qri/blob/master/CONTRIBUTOR.md">
   Contribute
  </a>
  <span> | </span>
@@ -51,7 +51,7 @@
 | "I want to download Qri" | [Download Qri](https://qri.io/download) |
 | "I have a question" | [Create an issue](https://github.com/qri-io/qri/issues) and use the label 'question' |
 | "I found a bug" | [Create an issue](https://github.com/qri-io/qri/issues) and use the label 'bug' |
-| "I want to help build the Qri backend" | [Read the Contributing guides](https://github.com/qri-io/qri/blob/master/.github/CONTRIBUTING.md) |
+| "I want to help build the Qri backend" | [Read the Contributing guides](https://github.com/qri-io/qri/blob/master/CONTRIBUTOR.md) |
 | "I want to build Qri from source" | [Build Qri from source](#build)
 
 __qri is a global dataset version control system (GDVCS) built on the distributed web__
@@ -62,7 +62,7 @@ Breaking that down:
 - Specific to **datasets** because data deserves purpose-built tools
 - **version control** to keep data in sync, attributing all changes to authors
 - On the **distributed web** to make *all* of the data published on qri simultaneously available, letting peers work on data together.
- 
+
 If you’re unfamiliar with *version control,* particularly the distributed kind, well you're probably viewing this document on [github](https://github.com/qri-io/qri) — which is a version control system intended for code. Its underlying technology – git – popularized some magic sauce that has inspired a generation of programmers and popularized concepts at the heart of the distributed web. Qri is applying that family of concepts to four common data problems:
 
 1. **Discovery** _Can I find data I’m looking for?_