improve service manager

- do not start sea server automatically
- replace _SERVICE in FRAPPY_HISTORY by service name
- imporve error messages
- no fiddling around with sys,path, reply on PYTHONPATH for
  finding packages

seaman.py

@@ -58,7 +58,7 @@ class SeaManager(ServiceManager):
       sea stop <instance> [<service>]
       sea list [<instance>]
 
-      <service> is one of main, stick, addons
+      <service> is one of sea, graph
       <instance> is one of %s
     """
 
@@ -66,22 +66,20 @@ class SeaManager(ServiceManager):
         try:
             self.check_running(ins, 'sea')
         except ServiceDown as e:
-            print('%s, try to start...' % e)
-            self.do_start(ins)
-            time.sleep(1)  # make sure caller did read the message
+            self.usage()
+            print(str(e))
         except KeyError:  # running on an other machine?
-            pass
+            self.usage()
         run_command('six -sea %s' % ins, wait=True)
 
     def do_gui(self, ins=''):
         try:
             self.check_running(ins, 'sea')
         except ServiceDown as e:
-            print('%s, try to start...' % e)
-            self.do_start(ins)
-            time.sleep(1)  # make sure caller did read the message
+            self.usage()
+            print(str(e))
         except KeyError:  # running on an other machine?
-            pass
+            self.usage()
         run_command('SeaClient %s' % ins)
         print('starting sea gui %s' % ins)
         time.sleep(5)