- [sass] improved styles for `.images-box` to handle properly anchors
- [nj] set slug for index page
- [nj] added `fancybox` and `urlFormat` macros
- [nj] catalog-section split into reusable _entry and content layouts; replaced code repitions with loops
- [nj] sidebarMenu objects moved to main layout to make it reusable in other places; improved `sidebarMenu()` macro