Added missing legal and patent policy information

Author: plehegar

CONTRIBUTING.md

@@ -1,25 +1,24 @@
 # Verifiable Claims Task Force
 
-Contributions to this repository are intended to become part of Recommendation-track documents 
-governed by the [W3C Patent Policy](https://www.w3.org/Consortium/Patent-Policy-20040205/) and
-[Document License](https://www.w3.org/Consortium/Legal/copyright-documents). To contribute, you must 
-either participate in the relevant W3C Working Group or make a non-member patent licensing
- commitment.
+Contributions to this repository are intended to become part of Recommendation-track documents governed by the
+[W3C Patent Policy](https://www.w3.org/Consortium/Patent-Policy-20040205/) and
+[Software and Document License](https://www.w3.org/Consortium/Legal/copyright-software). To make substantive contributions to specifications, you must either participate
+in the relevant W3C Working Group or make a non-member patent licensing commitment.
 
 If you are not the sole contributor to a contribution (pull request), please identify all 
-contributors in the pull request's body or in subsequent comments.
+contributors in the pull request comment.
 
- To add a contributor (other than yourself, that's automatic), mark them one per line as follows:
+To add a contributor (other than yourself, that's automatic), mark them one per line as follows:
 
- ```
- +@github_username
- ```
+```
++@github_username
+```
 
- If you added a contributor by mistake, you can remove them in a comment with:
+If you added a contributor by mistake, you can remove them in a comment with:
 
- ```
- -@github_username
- ```
+```
+-@github_username
+```
 
- If you are making a pull request on behalf of someone else but you had no part in designing the 
- feature, you can remove yourself with the above syntax.
+If you are making a pull request on behalf of someone else but you had no part in designing the 
+feature, you can remove yourself with the above syntax.

LICENSE.md

@@ -1,2 +1,4 @@
-All documents in this Repository are licensed by contributors under the [W3C Document
-License](https://www.w3.org/Consortium/Legal/copyright-documents).
+All documents in this Repository are licensed by contributors
+under the 
+[W3C Software and Document License](https://www.w3.org/Consortium/Legal/copyright-software).
+