Bump ring and compojure versions

This works for me with Leiningen 2.0.0
Bump ring and compojure across the rest of the tutorials
Merge pull request #13 from pangloss/patch-1

thanks so much.
Fix typos
Merge pull request #14 from benmoss/typos

Fix typos
Update doc/tutorial-01.md

typo corrected on line 13
Merge pull request #15 from greywolve/patch-1

Update doc/tutorial-01.md
Update doc/tutorial-13.md

small corrections
Update doc/tutorial-04.md

I should add a spelling checker to my emacs....
Update doc/tutorial-05.md

small correction
Update doc/tutorial-11.md

fixed link to tutorial-12
Update doc/tutorial-02.md

Added reminder to visit the page through localhost (using file:/// does not connect the brepl)
Merge pull request #16 from nchurch/patch-1

Update doc/tutorial-02.md
Update doc/tutorial-02.md

Added grey box for the urls to fit with the tutorial's style; apologies for omitting this.  Thanks for a wonderful tutorial!
Merge pull request #17 from nchurch/patch-2

Update doc/tutorial-02.md
ring has moved

https://github.com/mmcgrana/ring

> Ring has moved to: https://github.com/ring-clojure/ring
Update doc/tutorial-03.md
Fix minor grammar issues and typos
Update doc/tutorial-04.md
Merge pull request #18 from aeosynth/patch-1

ring has moved