Initial implementation of Pundit authorization adapter
Refactored implementation of Pundit authorization adapter
Added info about Pundit support into documentation
"Batch actions" should float to left

When followed by scope buttons pushes scopes to a different line
Fixed docs re: custom resource retrieval

The documentation incorrectly states that the user should redefine the controller's resource method, but this can have a number of unintended consequences.  Instead, the user should redefine the find_resource method.
Add .Thumbs.db to .gitignore.

Windows generates .Thumbs.db files for folders. GIT should ignore those.
Clean up code style issues in Gemfile, Rakefile and *.gemspec.

* use single quotes
* use the new Ruby 1.9.3 hash syntax
* use $LOAD_PATH instead of $.
* use fail instead of raise for system exceptions
Merge pull request #2979 from braingourmets/task/gitignore

Add .Thumbs.db to .gitignore.
Update the Rails versions in .travis.yml to the latest versions.

* change 4.0.2 to 4.0.3
* change 3.2.16 to 3.2.17
Merge pull request #2983 from braingourmets/task/rails-4.0.3

Update the Rails versions in .travis.yml to the latest versions.
clean up spec strings
make `pretty_format` compatible with Bignum

In particular, Bignum doesn't support `instance_exec` because it
doesn't have a singleton class. Previously `pretty_format` would pass
the number to `display_name`, which would default in running it against
the DISPLAY_NAME_FALLBACK proc.

Note that this should also be fixed in `display_name` itself, but any
attempt to do so hanged, consuming all memory on my computer :<
Merge pull request #2980 from braingourmets/cleanup/codestyle

Clean up code style issues in Gemfile, Rakefile and *.gemspec.
Merge pull request #2956 from jmcnevin/patch-1

Fix docs re: custom resource retrieval
bring ukrainian and russian locales up to date
translations for few and many items
test Ruby 2.1.1
Can customize or remove blank slate link
Merge pull request #2954 from elia/patch-2

"Batch actions" should float to left
Merge pull request #2989 from quainjn/customize_blank_slate_link

Can customize or remove blank slate link