baseline before concurrency updates
1. Moved recurrences update to application didFinishLaunchingWithOptions
2. Added NSOperations for Line Chart data process.
3. Added NSOperations for Pie Chart data process.
4. Added NSOperations for Transaction fetch used for plots.
5. Added line plots and table view.
6. Moved save context function from addTransactionHandles to spnSpendTracker
7. Accommodate weekOfYear member of date components.
Introduced Bar Plot class.