Blog: bugfix for limit in getRelated

getRelated didn't listen to $limit. F.e.: you want 10 related items,
but you only got 5, because the $limit in
FrontendTagsModel::getRelatedItemsByTags is 5 by default.
Changelog updated.
files is a method not a property
App logs and cache folder added
App logs and cache folder added
Layout installer for cache and logs folder