Add Q/A to "Common Problems" in Readme

[fbarriga]

Q: I get this error:

Traceback (most recent call last):
File "./andbug", line 28, in main
andbug.command.run_command(args)
File "/home/felipe/AndBug/lib/andbug/command.py", line 220, in run_command
return ctxt.perform(args[0], args[1:])
File "/home/felipe/AndBug/lib/andbug/command.py", line 150, in perform
if act.proc: self.connect()
File "/home/felipe/AndBug/lib/andbug/command.py", line 60, in connect
self.sess = andbug.vm.connect(self.pid, self.dev)
File "/home/felipe/AndBug/lib/andbug/vm.py", line 921, in connect
conn = andbug.proto.connect(andbug.proto.forward(pid, dev))
File "/home/felipe/AndBug/lib/andbug/proto.py", line 97, in connect
p.start()
File "/home/felipe/AndBug/lib/andbug/proto.py", line 278, in start
self.readHandshake()
File "/home/felipe/AndBug/lib/andbug/proto.py", line 162, in readHandshake
data = self.read(len(HANDSHAKE_MSG))
File "/home/felipe/AndBug/lib/andbug/proto.py", line 132, in read
pkt = self._read(sz)
File "/home/felipe/AndBug/lib/andbug/proto.py", line 80, in read
if not pkt: raise EOF()
EOF: EOF

A: You can't run AndBug with DDMS running. Try shutting it down first.

[swdunlop]

Updated, thank you for the heads up.