Feature: Added a Tax Management form and a beer consumption report.

Chore: Fixed some Form_Load function names as they were copied from old forms and were not neat.
Feature: Management BI Improved and should be pretty much solid by now.

Tanshu.Accounts.PointOfSale/Reports/BeerConsumptionForm.cs

@@ -0,0 +1,102 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+using Tanshu.Accounts.Repository;
+using Tanshu.Accounts.Contracts;
+using System.Data;
+using System.Collections.Specialized;
+
+namespace Tanshu.Accounts.PointOfSale
+{
+    public partial class BeerConsumptionForm : Form
+    {
+        IList<BeerConsumptionDetail> _list;
+        public BeerConsumptionForm()
+        {
+            InitializeComponent();
+            dgvSale.AutoGenerateColumns = false;
+        }
+
+        private void dtpStart_ValueChanged(object sender, EventArgs e)
+        {
+            ShowStatement();
+        }
+
+        private void ShowStatement()
+        {
+            if (DateTime.Today.Subtract(dtpStart.Value.Date).Days > 5 && !Session.IsAllowed("Accounts Audit"))
+                return;
+            var bi = new ReportsBI();
+            _list = bi.BeerConsumption(dtpStart.Value, dtpFinish.Value);
+            dgvSale.DataSource = _list;
+        }
+
+        private void dtpFinish_ValueChanged(object sender, EventArgs e)
+        {
+            ShowStatement();
+        }
+
+        private void BeerConsumptionForm_Load(object sender, EventArgs e)
+        {
+            dtpStart.Value = DateTime.Today;
+            dtpFinish.Value = DateTime.Today;
+            ShowStatement();
+        }
+
+        private void btnPrint_Click(object sender, EventArgs e)
+        {
+            if (_list == null)
+                return;
+            var startDate = dtpStart.Value.Date.AddHours(6);
+            var finishDate = dtpFinish.Value.Date.AddDays(1).AddHours(5);
+            //Print.Thermal.PrintSale(Session.User.Name, _list, startDate, finishDate);
+        }
+
+        private void btnClose_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+
+        private void btnExport_Click(object sender, EventArgs e)
+        {
+            var q = new decimal[_list.Select(x => x.Date.ToString("dd-MMM-yyyy")).Distinct().Count(), _list.Select(x => x.Name).Distinct().Count()];
+            var dates = new List<string>();
+            var names = new List<string>();
+            string data;
+            foreach (var item in _list)
+            {
+                var date = item.Date.ToString("dd-MMM-yyyy");
+                if (!dates.Contains(date))
+                {
+                    dates.Add(date);
+                }
+                if (!names.Contains(item.Name))
+                {
+                    names.Add(item.Name);
+                }
+                q[dates.IndexOf(date), names.IndexOf(item.Name)] += item.Quantity;
+            }
+
+            if (_list == null)
+                return;
+            data = "Date";
+            foreach (var item in names)
+            {
+                data += string.Format("\t{0}", item);
+            }
+            data += "\n";
+
+            for (int i = 0; i < dates.Count; i++)
+            {
+                data += dates[i];
+                for (int j = 0; j < names.Count; j++)
+                {
+                    data += string.Format("\t{0}", q[i, j]);
+                }
+                data += "\n";
+            }
+            Clipboard.SetText(data, TextDataFormat.Text);
+        }
+    }
+}