Update Contributing Guidelines

CONTRIBUTING.md

@@ -9,9 +9,10 @@ Looking to contribute something to Font Awesome? **Here's how you can help.**
 New icons mostly start as requests by the [Font Awesome community on GitHub](../../issues). Want to request a new icon? Here are some things to keep in mind:
 
 1. Please be nice. Font Awesome is a happy place.
-2. Please [search](../../search?type=Issues) to see if your icon request already exists. If a request is found, please +1 that one.
-3. Please make requests for single icons, unless you are requesting a couple of strictly related icons (e.g., thumbs-up/thumbs-down).
-4. Please and thank you if you include the following:
+2. Please do not request comprehensive sets of icons related to a very specific field.
+3. Please [search](../../search?type=Issues) to see if your icon request already exists. If a request is found, please +1 that one.
+4. Please make requests for single icons, unless you are requesting a couple of strictly related icons (e.g., thumbs-up/thumbs-down).
+5. Please and thank you if you include the following:
   - Title your [new issue](../../issues/new?title=Icon%20Request:%20icon-) `Icon request: icon-name` (e.g., `Icon request: icon-car`).
   - Include a few use cases for your requested icon. How do you plan on using it?
   - Attach a single color image or two that represent the idea you're going for.
@@ -51,6 +52,7 @@ As of v3.2.0, Font Awesome's CSS, LESS, SCSS, and documentation are all powered
 
 - At the moment we are not accepting pull requests containing icons
 - Submit all pull requests against the appropriate `*-wip` branch for easier merging
+- If your PR only affect the docs, feel free to push against the `master` branch
 - Any changes to the docs must be made to the Liquid templates in the `src` directory
 - Any changes to the styles must be made to the .less and .scss files in the `src` directory
 - If modifying the .less and .scss files, always recompile and commit the compiled files