power year in review locations from data file

this still isn't being updated regularly, but will make that easier in
the future, since now it will just involve updating the data file.

data/locations.yaml

@@ -0,0 +1,29 @@
+- name: United States
+  flag: united_states_1f1fa-1f1f8.svg
+
+- name: Greece
+  flag: greece_1f1ec-1f1f7.svg
+
+- name: Germany
+  flag: germany_1f1e9-1f1ea.svg
+
+- name: United Kingdom
+  flag: united_kingdom_1f1ec-1f1e7.svg
+
+- name: Singapore
+  flag: singapore_1f1f8-1f1ec.svg
+
+- name: China
+  flag: china_1f1e8-1f1f3.svg
+
+- name: Belgium
+  flag: belgium_1f1e7-1f1ea.svg
+
+- name: Austria
+  flag: austria_1f1e6-1f1f9.svg
+
+- name: Peru
+  flag: peru_1f1f5-1f1ea.svg
+
+- name: Australia
+  flag: australia_1f1e6-1f1fa.svg

layouts/_default/year-in-review.html

@@ -176,46 +176,12 @@ <h1 class="large-title">Locations</h1>
         </div>
 
         <div class="locations">
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/united_states_1f1fa-1f1f8.svg" alt="United States flag">
-            United States
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/greece_1f1ec-1f1f7.svg" alt="Greece flag">
-            Greece
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/germany_1f1e9-1f1ea.svg" alt="Germany flag">
-            Germany
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/united_kingdom_1f1ec-1f1e7.svg" alt="United Kingdom flag">
-            United Kingdom
-          </div>
-           <div class="location-item">
-            <img src="/assets/year-in-review/flags/singapore_1f1f8-1f1ec.svg" alt="Singapore flag">
-            Singapore
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/china_1f1e8-1f1f3.svg" alt="China flag">
-            China
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/belgium_1f1e7-1f1ea.svg" alt="Belgium flag">
-            Belgium
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/austria_1f1e6-1f1f9.svg" alt="Austria flag">
-            Austria
-          </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/peru_1f1f5-1f1ea.svg" alt="Peru flag">
-            Peru
+          {{- range $.Site.Data.locations -}}
+            <div class="location-item">
+              <img src="/assets/year-in-review/flags/{{ .flag }}" alt="{{ .name }} flag">
+              {{ .name }}
             </div>
-          <div class="location-item">
-            <img src="/assets/year-in-review/flags/australia_1f1e6-1f1fa.svg" alt="Australia flag">
-            Australia
-          </div>
+          {{- end -}}
           <p class="locations-disclaimer">*Top 10 locations ranked by commits, accurate as of Aug 2019</p>
         </div>
       </div>