Added Mosaic model and migration. closes #74
switched datbase to mysql
adding slug populator script
Adding migration to rename mosaic to <osaicItems
updating script that populates mosaic_items
changing gitignore to not ignore images dir
Added:limit of 90 mosaic items to homepage, migration to add link_title to mosaic items, display of mosaic items on template
fixing lowercase call from template
changes to homepage style to match live site
merged mosaic down to carousel branch