log output: add DEBUGV and begin cleanup

* add DEBUGV loglevel
* move most of the huge log outputs to DATADUMP
* move most of the really frequent log outputs to DEBUGV

Next I'm reevaluating the log level assigned to each output and the information they provide. Ideally I'm thinking the default log level should be INFO (20) and should give the user a good picture of what their node is doing on the network without being too much or too many to read in realtime.
I have also suggested that import style in the past (#674) but I was unuccessful. I suppose you have a Mac and it works for you, so I 'll ping @hoffmabc to test this, as he had issues with my older PR on his Mac. Your code runs fine on my Linux Mint 17.