Updated routes for admins dashboard

• Updated:
- routes for admins dashboard (expenses, group categories, promotions, trending hashtags) that were in the /settings path but are now in the /admin path
- /filters to be in /settings/filters

• Removed:
- authorize_follow route

app/controllers/admin/expenses_controller.rb

@@ -0,0 +1,11 @@
+class Admin::ExpensesController < Admin::BaseController
+	def index
+    @amount = Redis.current.get("monthly_funding_amount") || 0
+	end
+
+  def create
+    Redis.current.set("monthly_funding_amount", params[:amount])
+		redirect_to admin_expenses_path
+	end
+
+end