Finishing Cursor Adpater for Workday

Description: Now using Cursor Loader for loading database content through Content Provider.
Update WorkdayListAdapter. It's now exteding SimpleCursorAdapter.
Still using View Holder pattern to improve performance.

Commit: Add

TaskNumber: #6
Finishing Cursor Adpater for Checkin

Description: Now using Cursor Loader for loading database content through Content Provider.
Updated CheckinListAdapter. It's now exteding SimpleCursorAdapter.
Still using View Holder pattern to improve performance.
Also adding image resources to use in checkin list

Commit: Add

TaskNumber: #6