make various edits

change name to rack-respond
adjust directory structure
edit READ.me
remove versions
create file for the gems version
make rack-respond file so user maintains naming conventions
edit gemspec file

Next steps as this is being reviewed:
I need to unpublish the gem, but it looks like ruby gems does not encourage complete deletion of a gem. Apparently only certain versions can be removed
I need to learn how to test this gem without publishing it first.