Add libgd submodule
Link to mobilect-widgets
Enable multithreading support
Link to libgda-5.0
Add database object
Add config.vapi
application: Load database on startup
Add window widget
application: Create a MpcjoWindow on activate
Add job order list view widget
window: Add a job order list view to stack
application: Load job orders after creating window
window: Add header bar with new and back buttons

When the stack has more than one children, the back button is visible;
otherwise the new button is visible.
database: Add methods for manipulating database objects

Add methods for creating, updating and removing customers, job orders and
purchase orders.
job-order-list-view: Add signal "job-order-selected"

This signal is emitted when a row is activated in the tree view.
Add job order editor widget
window: Create editor when an item is selected
job-order-editor: Remove purchase order editing

This will be moved to a new widget in the future.