Fixed broken links in tasks-module. Translated some views into german.

app/views/tasks/new.haml

@@ -1,11 +1,11 @@
-- title _('Create new task')
+- title "Neue Aufgabe erstellen"
 
 #form{:style => "float:left; width:39em"}
-  - form_tag :action => 'create' do
-    = render :partial => 'form'    
-    = submit_tag _('Create task')
+  - form_for :task, @task, :url => {:action => 'create'} do |form|
+    = render :partial => 'form', :locals => {:form => form}
+    = submit_tag "Aufgabe erstellen"
  
 #workgroup_members{:style => "padding-left:41em"}
-  %h3=_ 'Members of the workgroups'
+  %h3 Mitglieder der Gruppe
   #list
     = render :partial => "shared/workgroup_members"