title: Enable buttons "Create and Import" in odoo's Tree View
body: <p>I am using odoo 8.0. I create a model and a view to manage that model. The code is like this:</p>
  
  <p><em>model.py</em></p>
  
  <pre><code>from openerp.osv import osv, fields
  
  class ServiceLink(osv.Model):
      _name = 'mymodule.servicelink'
      _description = 'Service link'
      _columns =  {
          'link': fields.char('Link')
      }
  </code></pre>
  
  <p><em>admin.xml</em></p>
  
  <pre><code>...
      &lt;record model="ir.actions.act_window" id="action_view_service_link"&gt;
          &lt;field name="name"&gt;Service Link&lt;/field&gt;
          &lt;field name="res_model"&gt;mymodule.servicelink&lt;/field&gt;
          &lt;field name="view_type"&gt;tree&lt;/field&gt;
          &lt;field name="view_mode"&gt;tree,form&lt;/field&gt;
      &lt;/record&gt;
  ...
  </code></pre>
  
  <p><em>ir.model.access.csv</em></p>
  
  <pre><code>id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
  id_01,mymodule.servicelink,model_mymodule_servicelink,base.group_user,1,1,1,1
  </code></pre>
  
  <p>I imported model(.py) to ____init__.py, admin.xml and ir.model.access.csv to ____openerp__.py >> data.
  What I have now: Tree View and Form View for the model worked. However, The button "Create" and "Import" on Tree View don't appear. </p>
  
  <p>My question is: Did I do anything wrong and what could I do to make them appear? Thank you and merry Christmas.</p>