Issue #1263896 by setvik: Content allowing optional contexts could be fooled by name changing fallback code and get the wrong context assigned.

Issue #1234618 by swentel and John Morahan: Allow controlling which deltas of a multi-value field api field are displayed in a pane.

Issue #1300464 by EclipseGc: update ctools_field_invoke_field() to handle non-entities masquerading as entities.

Forward port the fixes from 6.x which where mostly done but cleanup extra
lines added to the top of php files and some slight mistakes.

Issue #1177220 by tim.plunkett: Expand coverage of ctools_dependent_pre_render to machine_name and date fields.