Added editing star rating graphically

Added ability to reload database connection (refresh problem)
Bugfix display hot books (no hot books, hot books are deleted books, no longer result in error 500)

cps/templates/admin.html

@@ -80,6 +80,7 @@
         <div>{{_('Current commit timestamp')}}: <span>{{commit}} </span></div>
         <div class="hidden" id="update_info">{{_('Newest commit timestamp')}}: <span></span></div>
         <p></p>
+        <div class="btn btn-default" id="restart_database">{{_('Reconnect to Calibre DB')}}</div>
         <div class="btn btn-default" data-toggle="modal" data-target="#RestartDialog">{{_('Restart Calibre-web')}}</div>
         <div class="btn btn-default" data-toggle="modal" data-target="#ShutdownDialog">{{_('Stop Calibre-web')}}</div>
         <div class="btn btn-default" id="check_for_update">{{_('Check for update')}}</div>

cps/templates/book_edit.html

@@ -39,7 +39,7 @@
       </div>
       <div class="form-group">
         <label for="rating">{{_('Rating')}}</label>
-        <input type="number" min="0" max="5" step="1" class="form-control" name="rating" id="rating" value="{% if book.ratings %}{{book.ratings[0].rating / 2}}{% endif %}">
+        <input type="number"  name="rating" id="rating" class="rating input-lg" data-clearable="" value="{% if book.ratings %}{{(book.ratings[0].rating / 2)|int}}{% endif %}">
       </div>
       <div class="form-group">
         <label for="cover_url">{{_('Cover URL (jpg)')}}</label>
@@ -114,6 +114,7 @@
 {% block js %}
 <script src="{{ url_for('static', filename='js/libs/typeahead.bundle.js') }}"></script>
 <script src="{{ url_for('static', filename='js/edit_books.js') }}"></script>
+<script src="{{ url_for('static', filename='js/libs/bootstrap-rating-input.min.js') }}"></script>
 {% endblock %}
 {% block header %}
 <link href="{{ url_for('static', filename='css/libs/typeahead.css') }}" rel="stylesheet" media="screen">

cps/templates/feed.xml

@@ -35,6 +35,7 @@
     <uri>https://github.com/janeczku/calibre-web</uri>
   </author>
 
+  {% if entries[0] %}
   {% for entry in entries %}
   <entry>
     <title>{{entry.title}}</title>
@@ -60,6 +61,7 @@
     {% endfor %}
   </entry>
   {% endfor %}
+  {% endif %}
   {% for entry in listelements %}
   <entry>
     <title>{{entry.name}}</title>

cps/templates/index.html

@@ -40,6 +40,7 @@
 <div class="discover load-more">
   <h2>{{title}}</h2>
   <div class="row">
+    {% if entries[0] %}
     {% for entry in entries %}
     <div id="books" class="col-sm-3 col-lg-2 col-xs-6 book">
       <div class="cover">
@@ -76,6 +77,7 @@
       </div>
     </div>
     {% endfor %}
+  {% endif %}
   </div>
 </div>
 {% endblock %}