* Add additional rewrite rules for situations where verbose page rules are required. Fixes #1.
* Disable canonical redirect when print template is requested. Also fixes #1.
* Update is_print() method to use WordPress API.
* Correct translation string implementation.
* Update code to better conform to WordPress Coding Standards.

Commit trunk version from WP.org repository. Contains in-development modifications to address problems with add_rewrite_endpoint() when WP_Rewrite::use_verbose_page_rules is true.