Allow data-fp-option-multiple to be specified in the options hash
Added new option to the README
Added missing periods in options list in README
Typo in README
Refactor filepicker_field

* allow to define arbitrary options
* update option naming to current API
Add secret key as config variable
Add Policy class
Secure file picker using policy and signature
Fix small issues
Fix signature
Add initializer to Policy class
Set expiry to default value when not present
Add support for new path option
Add writer for default_expiry
Rails 4 compatible
Merge pull request #27 from erneestoc/rails4

Rails4
Merge pull request #19 from masondesu/master

Allow user to specify `:multiple => true` for uploads
Merge branch 'feature/issue-22'

Conflicts:
	lib/filepicker/rails/form_builder.rb
Merge pull request #1 from Filepicker/master

merge back