Add no-inserts mode

[RiedleroD]

A mode where inserts are emulated through swaps. The algorithms are still able to use the INSERT and BUCKINSERT actions, but those will then be translated to the according SWAP actions by BASAV.

This won't be a problem as long as no BUCKINSERTs are done, as those cannot be done through other actions. To solve this problem, a new action will be introduced. See #21.