set up an auto-pub bot

Author: siusin

CONTRIBUTING.md

@@ -5,6 +5,10 @@ Contributions to this repository are intended to become part of Recommendation-t
 [Software and Document License](http://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.
 
+# Pull Requests
+
+To make a pull request, please edit the `index.bs` in the `master` branch, our travis bot will generate a `index.html` and push the file to `gh-pages` branch once you submit your patch.
+
 If you are not the sole contributor to a contribution (pull request), please identify all 
 contributors in the pull request comment.
 

index.bs

@@ -7,6 +7,7 @@ Group: webplatform
 Editor: Marijn Kruisselbrink, Google, [email protected], w3cid 72440
 Editor: Vsevolod Shmyroff, Yandex, w3cid 93074
 Former Editor: Arun Ranganathan, Mozilla Corporation, http://arunranga.com/, [email protected], w3cid 37240
+Prepare For TR: true
 Status: ED
 ED: https://w3c.github.io/FileAPI/
 TR: https://www.w3.org/TR/FileAPI/