Merge pull request #4 from plotly/d3-without-format

Drop unused format functions from d3-v3 fork

Author: archmoj

.gitattributes

@@ -1,2 +1 @@
 d3.js -diff merge=ours
-d3.min.js -diff merge=ours

CONTRIBUTING.md

@@ -18,7 +18,7 @@ To contribute new documentation or add examples to the gallery, just [edit the W
 
 3. Create a new branch for your new feature. For example: `git checkout -b my-awesome-feature`. A dedicated branch for your pull request means you can develop multiple features at the same time, and ensures that your pull request is stable even if you later decide to develop an unrelated feature.
 
-4. The `d3.js` and `d3.min.js` files are built from source files in the `src` directory. _Do not edit `d3.js` directly._ Instead, edit the source files, and then run `make` to build the generated files.
+4. The `d3.js` file is built from source files in the `src` directory. _Do not edit `d3.js` directly._ Instead, edit the source files, and then run `make` to build the generated files.
 
 5. Use `make test` to run tests and verify your changes. If you are adding a new feature, you should add new tests! If you are changing existing functionality, make sure the existing tests run, or update them as appropriate.