Fix databag form url to allow new item creation; CHEF-3951
Use select_tag, not select, to generate non-object form; CHEF-4004
update rails version for security update
temporarily change accept header for cookbook file requests
use get instead of fetch to get files for cookbook display
Merge pull request #20 from smith/nls/CHEF-4644-rails-update

[CHEF-4644] Update rails version for security update
Merge pull request #21 from smith/nls/CHEF-3952-cookbook-rendering-fix

[CHEF-3952] cookbook rendering fix