== Encyclopedic in tone? Tutorial? == 

 Previous contributors have written some extremely useful material, but parts of this article are heading towards becoming a tutorial or manual. In some places the tone is not encyclopedic. See WP:NOT#IINFO - "Wikipedia articles should not include instructions or advice " [...] " or contain "how-to"s. This includes tutorials, walk-throughs, instruction manuals...". This useful material should be moved to a sister site. 

 "Wikipedia is an encyclopedic reference, not a textbook. The purpose of Wikipedia is to present facts, not to teach a subject matter. It is not appropriate to create or edit articles which read as textbooks, with leading questions and step-by-step problem solutions as examples. These belong on our sister projects Wikibooks and Wikisource"