Added PROPFIND verb support
Update ShowExceptions to suit latest rack master

* Post 893a2c50 in rack/rack, the #pretty method used while generating
  the HTML error markup, implemented in Rack::ShowExceptions, returns a
  String instead of an Array. This change uses Array() to
  convert the exception string in both plain text and HTML modes
  to an array.
Added date to exception message
Fix to show local time instead of GMT
Prefer strings over symbols in Japanese README
Merge pull request #909 from tayler1/master

Added date to exception message
Use default strftime in exception log added in #909
Merge pull request #911 from kami30k/readme-ja-symbols-to-strings

Prefer strings over symbols in Japanese README [ci skip]
Merge pull request #897 from markbates/master

Added PROPFIND verb support
Merge pull request #907 from kgrz/fix-error-with-rack-master

Update ShowExceptions to suit latest rack master
Revert "Added PROPFIND verb support"
Merge pull request #912 from sinatra/revert-897-master

Revert "Added PROPFIND verb support"