Sorted dict 1

Pull request for SortedDict and BalancedTree23 taking into account Kevin Squire's feedback from the past 12 days.
Stephen, I'm glad to gear you were able to figure out your problems. I look
forward to your progress!

On Thursday, November 13, 2014, StephenVavasis <notifications@github.com>
wrote:

> In .gitignore:
>
> > @@ -0,0 +1,216 @@
> > +#################
>
> Dear Kevin, I figured out the answers to my own questions in my previous
> post... first, I got the latest Julia nightly today using apt-get update
> and upgrade. Apparently it was delayed by one day compared to Windows.
> Second, I figured out that I am getting the SIGKILL in my Julia code
> because there isn't enough swap space, as I have determined by using the
> 'watch' command in linux. Apparently I set up my virtual linux machine with
> incorrect memory sizes. So next I will figure out how to increase the swap
> space for Ubuntu running inside VirtualBox, hopefully without a complete
> reinstall, and then I'll go back to working on code coverage.
> … <#149ac48bfe501769_>
> -- Steve
> On Thu, 30 Oct 2014, Kevin Squire wrote: In .gitignore: > @@ -0,0 +1,216
> @@ > +################# While some of the extra additions to .gitignore
> might be useful, many of them are extraneous for this project. Would you
> mind removing this from the commit, and perhaps resubmitting as a separate
> PR with more targeted ignores? — Reply to this email directly or view it on
> GitHub.[AHhEhzbIjOxMACLUYJjDLuYrEROh5wkCks5nIiv9gaJpZM4CfNMR.gif]
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/JuliaLang/DataStructures.jl/pull/53/files#r20340745>.
>