Merge pull request #17 from bikeexchange/master

Handle whitespaces in hidden inputs
add GitHub Flavored Markdown to README

* This makes the example code easier to read,
  especially when perusing the docs on github
Merge pull request #18 from phlipper/patch-1

add GitHub Flavored Markdown to README
Add negative_file_field_tag and negative_check_box_tag
Merge pull request #19 from edouard/add_file_field_and_check_box

Add negative_file_field_tag and negative_check_box_tag
Readability / whitespace
Bump version
Loosen dependency on actionpack

We need actionpack but there is no need to require Rails 3 as it works just fine with Rails 2.
Merge pull request #20 from clemens/master

Loosen dependency on actionpack
Test that negative captcha returns field data as it is encrypted
Do not include missed fields in values hash.

Necessary as one Captcha configuration may be used for multiple
configurations of the same form, and nulling out the data when the
form parameter is deliberately omitted is not desireable.
Return values array as a HashWithIndifferentAccess, as that's what the params hash is.

Adds activesupport as a dependency, but if you have actionpack you'll have activesupport anyway.