Fixed PositionSnapShot
Added class ProductStaticData, TargetPrice and relative test class to the project. This was done to address the // todo: introduce class ProductStaticData that describes details of product. get data from db on subscription in product class.
Merge remote-tracking branch 'origin/master'

Conflicts:
	yats/src/main/java/org/yats/trading/ReceiptStorage.java
	yats/src/test/java/org/yats/trading/ReceiptStorageTest.java