init tests
split methods into DataControler and Commands
add order test
change in add order, add exception
add test: OrderWrongSandwich
change in OrderWrongSandwich, SandwichNum = Any<int>
return Order in AddOrder, change in OrderWrongSandwich
use exceptions in OrderWrongSandwich
remove Guid from constructors, remove redundant references
change references in Sandwich.Tests.csproj
Store() can't be call in OrderWrongSandwich
Exceptions in Commands
Merge pull request #12 from ela-compil/Tests

Tests