Use valid css selector for input[name=...

As of Capybara 2.1 css selectors are sent straight through to
the driver.
https://github.com/jnicklas/capybara/blob/master/History.md#added
Find hidden input field finders
Merge pull request #109 from spedmg/fix-input-css-selectors

Use valid css selector for input[name=...
Update .travis.yml

add lastest versions of ruby lang
Merge pull request #125 from lucianosousa/patch-1

Update .travis.yml
Update Readme

with information to use status s3 return action
Cache policy attribute of uploader

Without such caching, calling #signature computes a new policy, which
may be different to a previous or subsequent retrieval of the policy, so
the signature may not match what is expected.
Merge pull request #126 from rafaelmacedo/master

Update Readme
Add #clear_policy! method to clear cached policy string
Working on #113
Changing to use decode as final step.
Reverting a bit.
Wrapping branch.
Update for removal of let() helper
Removing extra \n
Bugfix: Use the 'mounted on' column for checking uniqueness.
Merge pull request #128 from avalancheau/cache-policy

Cache policy attribute of uploader
Merge pull request #132 from vinniefranco/multi-encode-issue-113

Multi encode issue 113
Merge pull request #136 from jazen/bugfix-use-mounted-on-column-for-checking-uniqueness

Bugfix: Use the 'mounted on' column for checking uniqueness.
Clean up README