Clean up whitespace

[#69540480]
Extract new expense logic into PORO

* create namespace for transaction types
* create resource
* create form
* create feature spec

[#69540480]
Move specs involving new expense form to transaction_log_expense

[#69540480]
Move new and create logic into TrasactionlogExpense

* Update new form
* Update controller
* Update model
* Update specs

[#69540480]
Remove unused resources, see commit b22dd89

[#69540480]
Use inverse_of

[#69540480]
Access ivars with wrapper, since it exists, and is more maintanable anyway

[#69540480]
Refactor methods to make it quack like an AR

[#69540480]
Access ivars with wrapper, since it exists, and is more maintanable anyway, again

[#69540480]
Merge pull request #89 from bignerdranch/refactor_transactions_log_expense

Refactor transactions log expense - [#69540480]