Adding app.config
- adding state control
- added column hiding
Writing to the database and displaying it on the DataGridView works now
Merge branch 'master' of https://github.com/muthukdi/ReceiptTracker

Conflicts:
	ReceiptTracker/Form1.Designer.cs
	ReceiptTracker/Form1.cs
Merge branch 'master' of https://github.com/muthukdi/ReceiptTracker

Conflicts:
	ReceiptTracker/Form1.Designer.cs
	ReceiptTracker/Form1.cs