Disable gems in _config.yml and enable with bundler instead

- Add `repository` to `_config.yml` as part of GitHub metadata

_config.yml

@@ -13,6 +13,7 @@ name                     : "Your Name"
 description              : "An amazing website."
 url                      : # the base hostname & protocol for your site e.g. "https://mmistakes.github.io"
 baseurl                  : # the subpath of your site, e.g. "/blog"
+repository               : # GitHub username/repo-name e.g. "mmistakes/minimal-mistakes"
 gh_repo                  :
 teaser                   : # filename of teaser fallback teaser image placed in /images/, .e.g. "500x300.png"
 # breadcrumbs            : false # true, false (default)
@@ -153,20 +154,20 @@ timezone: # http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 
 
 # Plugins
-gems:
-  - jekyll-paginate
-  - jekyll-sitemap
-  - jekyll-gist
-  - jekyll-feed
-  - jemoji
+# gems:
+#   - jekyll-paginate
+#   - jekyll-sitemap
+#   - jekyll-gist
+#   - jekyll-feed
+#   - jemoji
 
 # mimic GitHub Pages with --safe
-whitelist:
-  - jekyll-paginate
-  - jekyll-sitemap
-  - jekyll-gist
-  - jekyll-feed
-  - jemoji
+# whitelist:
+#   - jekyll-paginate
+#   - jekyll-sitemap
+#   - jekyll-gist
+#   - jekyll-feed
+#   - jemoji
 
 
 # Archives
@@ -203,4 +204,4 @@ tag_archive:
 compress_html:
   clippings: all
   ignore:
-    envs: development
+    envs: development