Updated to modern rspec using transpec

Removed rake spec, use rspec instead.

README is now md instead of rdoc

Upgrade rspec version in Gemfile

Delete rdoc readme
> Not a problem. OK if .ruby-version is added to the .gitignore?
> 

Not at all, it should be in there. I made a commit but haven't pushed it yet (dragged out to lunch).

I'll get that pushed and I'm going to add the gem to Travis for testing.


> On Nov 25, 2014, at 12:24, Alan deLevie <notifications@github.com> wrote:
> 
> In .ruby-version:
> 
> > @@ -0,0 +1 @@
> > +2.1.2
> Not a problem. OK if .ruby-version is added to the .gitignore?
> 
> —
> Reply to this email directly or view it on GitHub.
>