* by MGN: fix errors with special identifiers fieldset.
* by MGN: fix coding errors resulting in coder warnings.

#122654 by bennybobw, dbabbage and MGN: Provide instructions for using custom breadcrumbs in README.txt.

#306637 by moshe weitzman, TUc: Trim data before comparing - and validator tip.
#264663 by sun: Wrong table definition in install schema.
#296166 by GROL, bangpound: Only first row checked (visibility patch).
#343418 by Todd Nienkerk: Permission to use PHP in custom breadcrumbs doesn't work.

Fixing the breadcrumb trails so they don't explode. We'll see if this has performance problems, but tabs won't disappear.

Fixing the help text for substitutions; subs were being done 'correctly' according to PHP date() syntax, but were mislabeled in the help text.

Initial commit of the Custom Breadcrumbs module. Allows administrators to set up parameterized breadcrumb trails  for any node type. This allows CCK-style node types to have "Home > User Blog > 2005 > January" style breadcrumbs on the node view page itself, syncronizing cleanly with custom views or pathauto aliases.