created necessary files
cleaning up
initial item created and tested
item and item_repository created and tested
just clean up
updated finder_methods list to include everything
merchant created and tested
just formatting
created and tested invoice
formatting
created and tested customer
created and tested invoice_item
created and tested transactions
created all repositories, only item_repository is tested
created sales_engine, passing self to repos
just tweaks
tweak
Merge branch 'master' of https://github.com/cbyn/sales_engine