Fixing #112365, adding #109723 and #110803. Adding prefix/suffix capability for help text and making handling of the .inc files friendler.

Minor typo in the token help for token_node.inc. Not worth rolling a new version for, at least for now.

Fixed a strange lock when calling node_build_content(); that call isn't really necessary anyways as we already have the fields.

Only return token descriptions if $type is 'node' or 'all'... Also added token_user.inc, providing basic user account tokens.

Fixing some blindingly obvious errors in the static token caching. Should now work when called many times in a row.

Adding support for the full range of core node tokens. Creation and modification dates, first taxonomy term, etc. Should be roughly compatible with pathauto. Also added a themed help function for use in entry forms.

Initial commit of token.module, an API for placeholder substitution. Allows modules like custom_breadcrumbs, pathauto, etc to all leverage the same integration code.