Addition of block token to ensure json block rendering is only available to those who can place blocks and make sure access denied check works

Peter Drake authored Nov 13, 2012 and Hunter Fox committed Nov 13, 2012

Issue #1253110 by pdrake: Support for pressflow, drupal_set_header returns an array instead of string

made declaration of context_condition_sitewide::editor_form and context_reaction_breadcrumb::execute compatible. Fix php E_STRICT warnings

Issue #901606 by pillarsdotnet, zilverdistel, wojtha, plach, Shawn_Smiley: Add configuration for menu to use in breadcrumbs; Fix for incorrect breadcrumbs when using menu contexts with the admin menu module