Initialize doc
Document future skus

A future sku is one soon to appear in shops which has null price_min and
price_max.
Add manufacturer's categories and skus endpoints
Make order of manufacturer skus, categories a table
Merge pull request #7 from skroutz/add_manufacturer_categories_and_skus

Add manufacturer's categories and skus endpoints
Fix help page
Document /skus/:id/similar
Display queries in search doc
Display queries in search doc
Add google analytics
Merge remote-tracking branch 'origin/analytics'
Uppercase SKU acronym everywhere.
Merge pull request #9 from skroutz/skus_similar

Document /skus/:id/similar
Add filtering by q keyword in /categories/:id/skus
Merge pull request #10 from skroutz/category_skus_search

Add filtering by q keyword in /categories/:id/skus
Add category_manufacturers in requests and responses
Add category manufacturers in documentation
Merge pull request #12 from skroutz/add_category_manufacturers

Add category manufacturers
Add shop locations requests/responses
Update documentation