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
Add option to not re-evaluate specific script tags

Adding data-turbolinks-eval=false to a script tag will not re-evaluate
the JavaScript again on turbolinks page visits. This can be used to
avoid moving script tags to the <head> to improve uncached page load
times.
Merge pull request #214 from mariovisic/add_turbolinks_eval_flag

Add option to not re-evaluate specific script tags
Updated documentation on events.
Merge pull request #217 from hayesr/event_doc

Updated documentation on events.
Preserve trailing slash in URL path
Merge pull request #219 from reed/normalize-path

Preserve trailing slash in URL path - Fixes #218
Update 'page:changed' to 'page:change' in README
Merge pull request #220 from sindrenm/fix/readme-changed-type

Update 'page:changed' to 'page:change' in README
Maintain redirect options in session. Fix #221

To reflect redirect_to options, keep redirect url in session to be set
'X-XHR-Current-Location' in response header.
Use X-XHR-Redirected-To instead of X-XHR-Current-Location

Set redirect location to X-XHR-Redirected-To header
only when server redirects user.
And use the location info in reflectRedirectedUrl.
Merge pull request #222 from YasuOza/keep_anchor_on_redirect

Maintain redirect options in session. Fix #221
Reflect changes from PR #222
merged upstream