unit test to verify BrokerClient account/positions process StrategyManager --  milestone two (end)
1. refactor historyDataFeeder
2. fix a bug in TimeWindowType.java so that now there are 6 instead of 5 daily bars in a week;
3. add EMA Calculator
4. Add property calculator and related test
1. add EMA and MACD Calculator
2. add relevant test
add historical test for M5 Momentum Strategy
view history test result in webConsole