grep: now prints the number of entries grepped

python/obitools3/commands/grep.pyx

@@ -359,6 +359,8 @@ def run(config):
     except Exception, e:
         raise RollbackException("obi grep error, rollbacking view: "+str(e), o_view)
 
+    logger("info", "Grepped %d entries" % len(o_view))
+
     # Save command config in View and DMS comments
     command_line = " ".join(sys.argv[1:])
     input_dms_name=[input[0].name]