Fix typo
Merge pull request #439 from seanhussey/patch-1

Fix typo
Clarify documentation - Fix #427
Fix that the progress bar would fill the entire screen in Safari 6

Perhaps some kind of stacking context (https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context) issue.

Fixes #436
Closes #437
Merge pull request #440 from javan/fix-progress-bar-in-safari-6

Fix that the progress bar would fill the entire screen in Safari 6
Turbolinks v2.5.3
test cases, fix
Merge pull request #441 from frohoff/fix-disposition-xss

Fix XSS vulnerability for html files served up with "Content-Disposition attachment" headers
keepscroll position fix