changes for #77

Code cosmetics
#75:
- More debug infos for kindlegen and sending e-mail.
- Button for sending test e-mail.
- timeout of 5min for sending e-mail

cps.py

@@ -2,10 +2,14 @@
 
 import os
 import sys
+from threading import Thread
+from multiprocessing import Queue
+import time
+
 base_path = os.path.dirname(os.path.abspath(__file__))
 
 # Insert local directories into path
-sys.path.insert(0,os.path.join(base_path, 'vendor'))
+sys.path.insert(0, os.path.join(base_path, 'vendor'))
 
 from cps import web
 from cps import config
@@ -15,11 +19,47 @@ from tornado.ioloop import IOLoop
 
 global title_sort
 
+
 def title_sort(title):
     return title
-if config.DEVELOPMENT:
-    web.app.run(host="0.0.0.0",port=config.PORT, debug=True)
-else:
-    http_server = HTTPServer(WSGIContainer(web.app))
-    http_server.listen(config.PORT)
-    IOLoop.instance().start()
+
+
+def start_calibreweb(messagequeue):
+    web.global_queue = messagequeue
+    if config.DEVELOPMENT:
+        web.app.run(host="0.0.0.0", port=config.PORT, debug=True)
+    else:
+        http_server = HTTPServer(WSGIContainer(web.app))
+        http_server.listen(config.PORT)
+        IOLoop.instance().start()
+        print "Tornado finished"
+        http_server.stop()
+
+
+def stop_calibreweb():
+    # Close Database connections for user and data
+    web.db.session.close()
+    web.db.engine.dispose()
+    web.ub.session.close()
+    web.ub.engine.dispose()
+    test=IOLoop.instance()
+    test.add_callback(test.stop)
+    print("Asked Tornado to exit")
+
+
+if __name__ == '__main__':
+    if config.DEVELOPMENT:
+        web.app.run(host="0.0.0.0",port=config.PORT, debug=True)
+    else:
+        while True:
+            q = Queue()
+            t = Thread(target=start_calibreweb, args=(q,))
+            t.start()
+            while True: #watching queue, if there is no call than sleep, otherwise break
+                if q.empty():
+                    time.sleep(1)
+                else:
+                    break
+            stop_calibreweb()
+            t.join()
+