Adds an option to disable modals.
Disables modals.
Moves modal cukes into their own feature.
Disables modal view feature.
Updates the feature descriptions.
Shortens feature background considerably.
Also disables adding of planning elements.

Used to work in modals.
Removes a spacer when modals are not used.
Updates changelog.
Merge remote-tracking branch 'opf/feature/rails3' into feature/disable-modals-in-timelines

Conflicts:
	doc/CHANGELOG.md
Merge pull request #305 from opf/feature/disable-modals-in-timelines

Feature/disable modals in timelines