Assignee field like Jira #2452 , in progress.

Assignee can not be removed yet, it removes member, wrong link in popup.

Thanks to xet7 !

client/components/cards/cardDetails.jade

@@ -73,6 +73,15 @@ template(name="cardDetails")
           a.member.add-member.card-details-item-add-button.js-add-members(title="{{_ 'card-members-title'}}")
             i.fa.fa-plus
 
+      .card-details-item.card-details-item-assignees
+        h3.card-details-item-title {{_ 'assignee'}}
+        each getAssignees
+          +userAvatar(userId=this cardId=../_id)
+          | {{! XXX Hack to hide syntaxic coloration /// }}
+        if canModifyCard
+          a.assignee.add-assignee.card-details-item-add-button.js-add-assignees(title="{{_ 'assignee'}}")
+            i.fa.fa-plus
+
       .card-details-item.card-details-item-labels
         h3.card-details-item-title {{_ 'labels'}}
         a(class="{{#if canModifyCard}}js-add-labels{{else}}is-disabled{{/if}}" title="{{_ 'card-labels-title'}}")
@@ -296,6 +305,18 @@ template(name="cardMembersPopup")
           if isCardMember
             i.fa.fa-check
 
+template(name="cardAssigneesPopup")
+  ul.pop-over-list.js-card-assignee-list
+    each board.activeAssignees
+      li.item(class="{{#if isCardAssignee}}active{{/if}}")
+        a.name.js-select-assignee(href="#")
+          +userAvatarAssignee(userId=user._id)
+          span.full-name
+            = user.profile.fullname
+            | (<span class="username">{{ user.username }}</span>)
+          if isCardAssignee
+            i.fa.fa-check
+
 template(name="cardMorePopup")
   p.quiet
     span.clearfix