Revert "Merge pull request #4 from plone/inlinedisposition"

This reverts commit 8c242bfdafa2456bf4372aa6e349cc45a34285f9, reversing
changes made to 8a6eb0aec426ee47718b0073556480b735be1de0.

This commit broke the Plone 5 build: http://jenkins.plone.org/job/plone-5.0-python-2.7/3173/console