Backlink to version list from yanked versions

Also fix a bug in the versions template causing the yanked indicator to
never appear.

Author: tari

app/templates/crate/version.hbs

@@ -41,7 +41,8 @@
         <p>This crate has been yanked, but it is still available for download for
         other crates that may be depending on it.</p>
         <p>You may wish to
-          {{#link-to 'crate' crate}}view the newest version{{/link-to}} instead.
+          {{#link-to 'crate.versions' crate}}view all versions{{/link-to}} to find one that
+          has not been yanked.
         </p>
         </div>
     </div>

app/templates/crate/versions.hbs

@@ -17,7 +17,7 @@
                 {{#link-to 'crate.version' version.num}}{{ version.num }}{{/link-to}}
 
                 <span class='small'>{{moment-format version.created_at 'LL'}}</span>
-                {{#if yanked}}
+                {{#if version.yanked}}
                     <span class='yanked'>yanked</span>
                 {{/if}}
             </div>