WIP on PLayer creation.
Still some problems with the commands ( specifically the CanExecuteChanged)

Added and modified the ctors for the entities
Merge branch 'master' of https://github.com/squelos/pmisoftwareClient

Conflicts:
	Tcp/TcpDataModel/TcpDataModel.csproj
	Tcp/TcpModernUI/Commands/PlayerSaveCommand.cs
	Tcp/TcpModernUI/Commands/SeasonsSaveCommand.cs
	Tcp/TcpModernUI/Pages/players/creation.xaml
	Tcp/TcpModernUI/Pages/seasons/creation.xaml
	Tcp/TcpModernUI/TcpModernUI.csproj
	Tcp/TcpModernUI/ViewModels/SeasonsViewModel.cs