Change column name from nickname to username.
Divided exchanges to wanted and offered- in Item model.
Item and exchange model refactoring.
Items index shows only available items.
Fixes dropdown menu styling.
Show swap button if user accepts exchange suggestion.
Adds action accepted on exchanges.
Item box helper
Replaced item box helper in views.
Route - accepted exchanges.
Fixes
Changed db to mysql.
Added validation for username.
User & exchange model - methods for getting out only valid exchanges.