Build trivial app using SQLite and Tcl/Tk

[andyblight]

Add very basic method of manually entering a trivial transaction into the database.

• [x] Implement SQLite basic demo using very simple share entry.
• [x] Implement very simple GUI to
  1. add new row.
  2. print all rows.

[andyblight]

Used this example https://www.activestate.com/resources/quick-reads/how-to-display-data-in-a-table-using-tkinter/ and modified to use simple shares.db database. 4710befa154190419b74db0b4cfb15f7504e8656 Shows all rows. Next add a new row using GUI.

[andyblight]

Worked out how to do nested layouts for labels and text entry fields. 50d6edc56461d8533801c6af4dcf13d7a8cbd808

[andyblight]

Entry and display tabs look right. Next:

• Add functions to read values from the entry tab.
• Add scrollbar to display tab.

[andyblight]

Changed app to use menus. Added about box as simple thing to try to understand the grid layout. Still seems like magic to me! 4 hrs. To complete this task:

• Show dummy data from SQLite in securities window.
• Add new record to the dummy data database and show it in the securities window.

[andyblight]

1h30 Added add securities dialog. UI works but needs to be hooked up to the database.

[andyblight]

2h00 Refactored menus. Securities table hooked up to Add securities dialog and treeview. Done. Total time: 10h00