First step fix for #37 wrong search adress

@ jschuck, @jgillmann, could you please confirm that you can search now?
Do you still have logout/login problems? -> redirects to Hostname instead of hostname/calibre?
(got this too with apache server, where as search worked before)

cps/templates/layout.html

@@ -53,7 +53,7 @@
         <div class="navbar-collapse collapse">
           <ul class="nav navbar-nav ">
             <li>
-              <form class="navbar-form navbar-left" role="search" action="/search" method="GET">
+              <form class="navbar-form navbar-left" role="search" action="{{url_for('search')}}" method="GET">
                 <div class="form-group">
                   <input type="text" class="form-control" name="query" placeholder="Search">
                 </div>