Auto merge of rust-lang#1601 - p-jackson:fix-icon-alignment, r=jtgeibel

Align crate icon with crate name in heading

The crate heading text (with name and version) are being aligned by baseline using flex, however the icon doesn't line up because it doesn't have baseline information.

Manually pushing the icon down so aligns "correctly" with the crate name.

Before 🤢 🤮
![image](https://user-images.githubusercontent.com/1500769/51534894-efa01f00-1eab-11e9-99a2-278b50209eab.png)

After 🌹 🦄
![image](https://user-images.githubusercontent.com/1500769/51534928-00e92b80-1eac-11e9-954d-18548d666c6c.png)

app/styles/crate.scss

@@ -26,6 +26,12 @@
             @include flex-direction(column);
         }
     }
+    .crate-icon {
+        // Icon doesn't align nicely with text (which is being
+        // aligned by their baselines) so manual adjustment needed.
+        position: relative;
+        top: 4px;
+    }
     h1 {
         padding-left: 10px;
         padding-right: 10px;

app/templates/crate/version.hbs

@@ -3,7 +3,7 @@
 <div id='crates-heading' data-test-heading>
     <div class="wide">
         <div class='info'>
-            {{svg-jar "crate"}}
+            {{svg-jar "crate" class='crate-icon'}}
             <h1 data-test-crate-name>{{ crate.name }}</h1>
             <h2 data-test-crate-version>{{ currentVersion.num }}</h2>
         </div>