Add headers file, CORS config

Author: grega

_config.yml

@@ -20,13 +20,14 @@ description: >- # this means to ignore newlines until "baseurl:"
 baseurl: "" # the subpath of your site, e.g. /blog
 url: "" # the base hostname & protocol for your site, e.g. http://example.com
 
-include: _redirects
+include:
+  - _redirects
+  - _headers
 
 # Build settings
 markdown: kramdown
 plugins:
   - jekyll-feed
-
 # Exclude from processing.
 # The following items will not be processed, by default. Create a custom list
 # to override the default setting.

_headers

@@ -0,0 +1 @@
+Access-Control-Allow-Origin: *