change e.printStackTrace() in catch blocks to be more helpful

[longlostnick]

Right now for debugging I have e.printStackTrace() in most of the catch blocks. This should be changed to be more helpful in each case.

For example, In issue #5 we should:

-log a message saying a server isn't available or went down. (server.log.write("message"))
-remove the server from the list
-proceed without interruption

We can also use this to gracefully re-connect a client to a new server when their current one goes down.