Serialization and Graphs :

- market serialization done with save button
- company graph : an unique graph with 2 series (n° of transactions and stock price) and 2 ordinates
- shareholder graph

To Do :
- finish load button
- show strategy name in an elegant way
truc bidule pour load market
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	INTECH STOCK EXCHANGE/Classes/Market.cs
	INTECH STOCK EXCHANGE/Classes/Shareholder.cs
	ISEdesign/MarketView.cs