Revert "Simple test"

This reverts commit 5cd2841a5ea9fb8163b720e3fe7c31fc03a26120.
Revert "Added skeleton for permutations algorithm"

This reverts commit 1da57042f6039b80c6004af2ddb9812b8e9701ba.
Moved code to lib/
Added test for multibasket
Method to return baskets implemented
Added test for adding a book to the current basket
Start new basket if current contains the book
Implemented clone
Some convenience functions
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