DC: include otto by square

also some cleanups, as always

Change-Id: Ie273fb86bb9ea8ea0bcea5a653b7a6a0f03f7476
DC: update readme

Change-Id: Idcd663a4834efdb05bbabedc504f3af1706fb1a7
DC: performance: pipe all through one shell

decreases calls to SU drastically as we collect the commands and once done,
we trigger it all through one shell.
thanks to roottools we reuse our opened shells for that task.

also since we have otto all goes more fluent as well, stuttering decreased,
all seems to be more smooth.
thats why i made use of otto at the cpu monitor as well.

Change-Id: Ida1dc220f02127dbe731080ee070e656e3294ca8
version: 0.3.1

Change-Id: Iea8e7cd3696f1e54bfaf013221318006615f09a9