more test cases done
Merge remote-tracking branch 'KyleRepository/master'

Conflicts:
	StockSimulation/src/edu/ycp/cs320/stocksimulation/shared/Stock.java
Aside from StockHistory and AccountSummaryCalculator, all the methods in
the rest of the model classes have been tested successfully

StockHistory has one method tested successfully
Added a method to copy data file from StockFetcher directory into
StockSimulationPersistence directory