Sorted Containers

Added sorted containers to DataStructures, testing, and documentation.
Replaced README.md with README.rst
Kevin,

Thanks for pointing out the nonstandard way that I wrote my testing files.  I will fix this in the next day or two and repost a modified version.  I will also make sure to run my tests on a Linux machine in addition to my windows machine.  (I should have done that already.)

-- Steve