Beefed up traffic sniffer
* modules/sniffer/traffic_sniffer.py
  -- Added a filter option to specify what traffic is sniffed
* modules/util.py
  -- Added a function for verifying the syntax of a tcpdump filter
* scapy/arch/linux.py
  -- Scapy doesn't read stderr when attaching filters, so we
     weren't able to take care of tcpdump complaining about invalid
	 filter syntax.  Modified slightly to take care of this.
New module
* zarp.py
  -- Import cleanup
* modules/zcrypto.py
  -- When doing remote stuff, I want to keep it as
     clean and portable as possible; this means not requiring
	 third party libs to be used.  zcrypto will implement a few
	 crypto algorithms I may need for portability reasons.  Nothing
	 too wild.
* modules/parameter/__init__.py
  modules/parameter/slarpc.py
  modules/parameter/slarpd.py
  -- A remote shell that works over the ARP protocol.  Requires the
  user to initialize a daemon process on the remote host before using.
  This works like a regular shell aside from a few caveats, and also
  supports encryption using RC4.
Small MTU change
* modules/parameter/slarpc.py
  -- updated comment and error output
* modules/parameter/slarpd.py
  -- Upped the MTU a bit
New Rosewill backdoor attack
* modules/dos/__init__.py
  -- Forgot to load NUD!
* modules/parameter/routers/__init__.py
  modules/parameter/routers/rosewill/__init__.py
  modules/parameter/routers/rosewill/rsva_backdoor.py
  -- Welcome to the party Rosewill; first module exploits a command
  injection fault in RSVA11001
Bug net
* modules/util.py
  -- Exception handler of keyboard interrupts in case a module doesnt
  catch it.
Merge branch 'dev'