added sql view budget_categories
deleted budgets_helper
changed routes for budgets
add BudgetCategory model into Category model
removed views to budgets
added views to categories
deleted unnnecesary budgets controller
added categories helper
added categories controller
deleted duplicated code
fecator code
moved categories to pocketmoney namespce
deleted budgets table
change route to categories.rb
moved filter class
renamed style file to budgets
moved set_period method at application helper
deleted unnecesary code