test_db_reset -> db_reset
Heroku specific mod in env
Undo previous alterations

* ee3c366 -- Undo previous a(...) -> heroku works...
* 058f5ef -- Heroku specific(...) -> heroku did not compile
* 008b08f --- test_db_reset (...)
* f6ac699 --- Simplify Line (...) -> after migration heroku: Sequel::Error no method line_item=
Final(?) test and refinements to models