Fixed StockFlyWeight to use the repository and a local cache whenever is needed.
Created Currency class, which will help to keep the stock price with decimal scale and same round strategy.
Created tests for StockFlyweight.
Initialized the stockFlyweight on the application On Create (need to be refactored)
StockFlywight test
Merge branch 'master' of http://github.com/lgsanjos/RendimentosFinanceirosApp

Conflicts:
	appTest/src/br/com/itibansistemas/rendimentos/TestSupport.java
	appTest/src/br/com/itibansistemas/rendimentos/stock/StockRepositoryTest.java