Update README.md
Updates to the Readme.md

I reformatted this README.md because I was in a really lame meeting.

Oh, also I thought the structure of this document was really all over the place before this edit.  This reformatting should be considered a start towards a better organization.
Updates to the Readme.md

Just made some things prettier here.  I still have some questions about how to run the thing.  Two configuration options are mentioned, but the example does not use those options at all.  It's hard for me as a new suer to know where to start.
More README.md updates

Updated some of the RangeDownloader details some more and set apart the examples a little clearer.