Update foundation javascript

This commit updates the foundation javascript library. This is due to a
bug that existed in older versions of foundation that caused dropdowns
to be incorrectly placed relative to their target.
Remove negative margin on dropdown

This commit removes the negative margin on the dropdown list of
entities. This css rule is no longer necessary as upgrading the
foundation javascript library resolved the dropdown misplacement on the
page.
Merge pull request #81 from WideEyeLabs/fix-foundation-dropdown

Fix foundation dropdown