* make test_membership.py use it
  * make test_generate_transaction_document use it

* Move patched functions from test_membership.py to relevant files
    * blockchain_tools.py
        * create mocked_block variable
        * make both patched_block and patched_head_block return mocked_block
    * auth.py
    * wot.py
* modify a pubkey list in patched/wot.py
* change calls in the tests
* change pubkeys in patched/money.py to match new pubkey_list

* create patched directory
* create files matching the silkaj modules
    * money.py
    * tools.py
    * wot.py
    * blockchain_tools.py
* delete patched.py
* change calls in the tests

change the tests to match the new behavior

- #314: dry-run option