Remove the reverse-dependency model for dependency

Looks like it required a bit of tweaking both server and client side. Also fixes
a link on the reverse dependencies page.

Author: alexcrichton

app/models/crate.js

@@ -20,5 +20,5 @@ export default DS.Model.extend({
     owners: DS.hasMany('users', {async: true}),
     version_downloads: DS.hasMany('version-download', {async: true}),
     keywords: DS.hasMany('keywords', {async: true}),
-    reverse_dependencies: DS.hasMany('reverse-dependency', {async: true}),
+    reverse_dependencies: DS.hasMany('dependency', {async: true}),
 });

app/models/reverse-dependency.js

@@ -16,7 +16,7 @@
             {{#link-to 'crate' crate_id}}{{crate_id}}{{/link-to}} requires {{req}}
                 {{#link-to 'crate' this}}{{ num }}{{/link-to}}
             </div>
-            {{#link-to 'crate' this class='arrow'}}
+            {{#link-to 'crate' crate_id class='arrow'}}
                 <img src="/assets/right-arrow-all-versions.png"/>
             {{/link-to}}
         </div>

app/templates/crate/reverse-dependencies.hbs

@@ -891,6 +891,6 @@ pub fn reverse_dependencies(req: &mut Request) -> CargoResult<Response> {
     }).collect();
 
     #[deriving(Encodable)]
-    struct R { reverse_dependencies: Vec<EncodableDependency> }
-    Ok(req.json(&R{ reverse_dependencies: rev_deps }))
+    struct R { dependencies: Vec<EncodableDependency> }
+    Ok(req.json(&R{ dependencies: rev_deps }))
 }