minor fix (initialize variable)

otherwise it won't be filled

fixed logo size setting (fixes #36) and fix media queries for more modern smartphones (hopefully)

(with large resolutions)

changed logo to use new tpl_getMediaFile() and exchanged fixed image dimensions with calculated ones (fixes #25)

added X-UA-Compatible to always use the best possible browser mode in IE and give users with Chrome Frame the chance to use it

updated _toc styles from the starter template and moved template-specific toc styles into design.css

moved pagetools images out of pagetools folder, because there are now significantly less files involved