Fix fsUtil.listVisible.
Improve File#html adding a param object which allows setting of class and id.
Cleanup File and add  created and modified properties.
Fs util: add listVisible.
Implement thumbnails#grayscale.
Implement Collection#inGroupsOf.
Implement TemplateParam#param.
Cleanup parsers.
Rename TemplateParam#render to #template.
Implement Site#getUrl.
Implement Site#helpers.
Rename Page#_renderTemplate to #template.
Add Page#index.
Add trailing slash to Page#url.
Cleanup Page.
Have Page#addFile add the file to right collection and clean it up.
Fix bug in s3 syncing.