Added code example for exclusion of turbolinks

Added an example of how to add data-no-turbolink to a div.
Added more heft to no-turbolink example

Added more details to the code snippet explaining the `data-no-turbolink` example.
Removed extraneous copy
Merge pull request #208 from marcamillion/patch-1

Added code example for exclusion of turbolinks
Replace history and location when xhr response status is 40x.

webkit has a bug in history state api. It occurs when 404 page is pushed to
history state and then reload the page.
This commit escape the bug with code retrieved from jquery.pjax.
Merge branch 'replace_location' of https://github.com/YasuOza/turbolinks into YasuOza-replace_location
Extracted fetchReplacement onload logic into new validateResponse method