Ignore error when parsing Client row.

Explanation of bug (Why error wasn't being caught):

```
try:
    ...
except IndexError, ValueError:
    # Only catches IndexError.
    # ValueError is a *variable* holding the IndexError !
```

py/Airodump.py

@@ -193,7 +193,7 @@ class Airodump(object):
                     # The current row corresponds to a "Client" (computer)
                     try:
                         client = Client(row)
-                    except IndexError, ValueError:
+                    except (IndexError, ValueError) as e:
                         # Skip if we can't parse the client row
                         continue
 

py/Client.py

@@ -21,15 +21,10 @@ class Client(object):
                     5 BSSID, (Access Point's MAC address)
                     6 Probed ESSIDs
         '''
-        try:
-            self.station =     fields[0].strip()
-            self.power   = int(fields[3].strip())
-            self.packets = int(fields[4].strip())
-            self.bssid   =     fields[5].strip()
-        except ValueError, e:
-            print "\nValueError ({})".format(e)
-            print "\twhile parsing {}".format(fields)
-            raise e
+        self.station =     fields[0].strip()
+        self.power   = int(fields[3].strip())
+        self.packets = int(fields[4].strip())
+        self.bssid   =     fields[5].strip()
 
 
     def __str__(self):