[#9] Add Order model, controller

[marcinkornek]

Add orders table with columns:

• total_price:decimal
• state:string
• user_id:integer

Add order_details table with columns:

• price:decimal
• amount:integer
• product_size_id:integer
• order_id:integer

Add associations

[marcinkornek]

9.1 done (01.02.2015) Add order list in header

[marcinkornek]

9.2 done (22.02.2015, move to directive 15.03.2015) Add notification/alert/something to report that no size was chosen open window to choose size

[marcinkornek]

9.3 done (12.04.2015) Add x to delete item from cart

[marcinkornek]

9.4 done (29.03.2015) Add modal to choose color and size when adding to cart on index page

[marcinkornek]

TODO 9.5 Add possibility to delete one or more items (when you have more than one the same item, now it deletes all of them)