Editorial: change links from http to https (w3c#607)

CONTRIBUTING.md

@@ -6,12 +6,11 @@ Any simple editorial contribution can simply be done with a GitHub Pull Request.
 You can even do an inline edit of the file on GitHub.
 
 For more substantial contributions that, please first start a thread in the
-[webapps mailing list](http://lists.w3.org/Archives/Public/public-webapps/)  at
-the W3C.
+[webapps mailing list](https://lists.w3.org/Archives/Public/public-webapps/) at the W3C.
 
 Note: Contributions to this repository are intended to become part of Recommendation-track documents governed by the
-[W3C Patent Policy](http://www.w3.org/Consortium/Patent-Policy-20040205/) and
-[Software and Document License](http://www.w3.org/Consortium/Legal/copyright-software). To make substantive contributions to specifications, you must either participate
+[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 
@@ -37,15 +36,15 @@ feature, you can remove yourself with the above syntax.
 
 - the spec uses [ReSpec](https://www.w3.org/respec/) 
 - the spec is tidied using [HTML5 Tidy](https://github.com/w3c/tidy-html5). For
-instructions on running HTML5 tidy, see below.  
+instructions on running HTML5 tidy, see below.
 - put comments in front of sections, for better readability with
-  syntax coloring   editors
+  syntax coloring editors.
 
 
 # Running HTML5 Tidy
 
 Please make sure you have HTML5 tidy installed, instead of
-the the one that  ships with *nix systems. You can comfirm this by running:
+the the one that ships with *nix systems. You can comfirm this by running:
 
 ```bash 
 tidy --version  #HTML Tidy for HTML5 (experimental) for ...

LICENSE.md

@@ -1,3 +1,3 @@
 All documents in this Repository are licensed by contributors
 under the 
-[W3C Software and Document License](http://www.w3.org/Consortium/Legal/copyright-software).
+[W3C Software and Document License](https://www.w3.org/Consortium/Legal/copyright-software).

explainer.md

@@ -123,7 +123,7 @@ If you omit the icons, the browser just falls back to looking for `<link rel="ic
 
 TBW.
 
-More information about purpose can be found in the [Web App Manifest spec](http://www.w3.org/TR/appmanifest/#purpose-member).
+More information about purpose can be found in the [Web App Manifest spec](https://www.w3.org/TR/appmanifest/#purpose-member).
 
 ## Display modes and orientation
 Apps need to be able to control how they are to be displayed when they starts-up. If it’s a game, it might need to be in full-screen and possibly in landscape mode. In order to do this, the manifest format provides you with two properties.
@@ -235,4 +235,4 @@ This is further described in the [robots.txt](http://www.robotstxt.org/) protoco
 A web app developer could also use the `X-Robots-Tag` HTTP header.
 
 ## Attribution
-The bulk of this explainer originally appeared in [HTML5 Doctor](http://html5doctor.com/) as "[The W3C App Manifest specification](http://html5doctor.com/web-manifest-specification/)", and was written by [Marcos Cáceres](https://github.com/marcoscaceres) and [Bruce Lawson](http://www.brucelawson.co.uk). This derivative work is allowed by the [Creative Commons Attribution-Non-Commercial 2.0](http://creativecommons.org/licenses/by-nc/2.0/uk/) license of the original document. Thus, feel free to change, reuse, modify, and extend this explainer. Some authors will retain their copyright on certain articles.
+The bulk of this explainer originally appeared in [HTML5 Doctor](http://html5doctor.com/) as "[The W3C App Manifest specification](http://html5doctor.com/web-manifest-specification/)", and was written by [Marcos Cáceres](https://github.com/marcoscaceres) and [Bruce Lawson](https://www.brucelawson.co.uk/). This derivative work is allowed by the [Creative Commons Attribution-Non-Commercial 2.0](https://creativecommons.org/licenses/by-nc/2.0/uk/) license of the original document. Thus, feel free to change, reuse, modify, and extend this explainer. Some authors will retain their copyright on certain articles.

index.html

@@ -24,22 +24,22 @@
       }, {
         name: "Kenneth Rohde Christiansen",
         company: "Intel Corporation",
-        companyURL: "http://intel.com",
+        companyURL: "https://intel.com/",
         w3cid: 57705
       }, {
         name: "Mounir Lamouri",
         company: "Google Inc.",
-        companyURL: "https://google.com",
+        companyURL: "https://google.com/",
         w3cid: 45389
       }, {
         name: "Anssi Kostiainen",
         company: "Intel Corporation",
-        companyURL: "http://intel.com",
+        companyURL: "https://intel.com/",
         w3cid: 41974
       }, {
         name: "Rob Dolin",
         company: "Microsoft Corporation",
-        companyURL: "https://microsoft.com",
+        companyURL: "https://microsoft.com/",
         w3cid: 60712
       },],
       wg: 'Web Platform Working Group',