Sorted dict 1

Pull request for SortedDict and BalancedTree23 taking into account Kevin Squire's feedback from the past 12 days.
Dear Readers,

My SortedDict code is now working under Linux, and so is the coverage 
feature.  Next question: for statements that involve branching within an 
expression, e.g., expressions involving &&, || or ?  :, can I check with 
the coverage feature whether all branches of the statement were exercised 
by my test set?

Thanks,
Steve


On Thu, 13 Nov 2014, Kevin Squire wrote:

> 
> In .gitignore:
> 
> > @@ -0,0 +1,216 @@
> > +#################
> 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
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> <https://github.com/JuliaLang/DataStructures.jl/pull/53/files#r20340745>.
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