Added vim style keyboard shortcuts (resolve #2)

- Navigating lists with `j` and `k`
- Moving to panel (task-detail to tasks to projects) with `h`

app/projects.go

@@ -111,6 +111,10 @@ func (pane *ProjectPane) addSection(name string) {
 
 func (pane *ProjectPane) handleShortcuts(event *tcell.EventKey) *tcell.EventKey {
 	switch event.Rune() {
+	case 'j':
+		pane.list.SetCurrentItem(pane.list.GetCurrentItem() + 1)
+	case 'k':
+		pane.list.SetCurrentItem(pane.list.GetCurrentItem() - 1)
 	case 'n':
 		app.SetFocus(pane.newProject)
 	}