Add python_objects.feature for developers

BDD Cycle:
    Red: I have a date and an description
Add step defn "I have a date and description"

BDD Cycle:
    Green: I have a date and a description
Add step defn "I create JournalEntry object"

BDD Cycle:
    Red: I attempt to create a JournalEntry object
Add step defn "I create JournalEntry object"

BDD Cycle:
    Green: I attempt to create a JournalEntry object
Add step defn "I should create the object wo error

BDD Cycle:
    Red: I should be able to create the object without error
Add step defn "I should create the object wo error

BDD Cycle:
    Green: I should be able to create the object without error
Add step defn: I have a JournalEntry...post ref

BDD Cycle:
    Red: I have a JournalEntry and 'amount', 'amount_type' (Credit or Debit) and a 'post ref.
Update step defn: I have a JournalEntry...post ref

BDD Cycle:
    Green: I have a JournalEntry and 'amount', 'amount_type' (Credit or Debit) and a 'post ref.
Add step defn: I create the Line Entry object

BDD Cycle:
    Red: I attempt to create the Line Entry object
Update LineEntry unit tests

BDD Cycle:
    Red: I attempt to create the Line Entry object
TDD Cycle:
    Red: It should have valid journal entry argument
Update LineEntry model's __init__

BDD Cycle:
    Green: I attempt to create the Line Entry object
TDD Cycle:
    Green: It should have valid journal entry argument
Refactor LineEntry model

BDD Cycle:
    Green: I attempt to create the Line Entry object
TDD Cycle:
    Refactor: It should have valid journal entry argument
Add step defn: access JournalEntry from LineEntry

BDD Cycle:
    Red: I should be able to access the JournalEntry date via the LineEntry instance
Update step defn: JournalEntry from LineEntry

BDD Cycle:
    Green: I should be able to access the JournalEntry date via the LineEntry
Add step defn: access LineItem description

BDD Cycle:
    Red: I should be able to access the JournalEntry description via the LineEntry instance
Update step defn: access LineItem descrip

BDD Cycle:
    Green: I should be able to access the JournalEntry description via the LineEntry instance
Add step defn: Access one of the fields

BDD Cycle:
    Red: I should be able to access one of the fields
Add step defn: Access one of the fields

BDD Cycle:
    Green: I should be able to access one of the fields
Add step defn: Credit/Debit attrs that balance

BDD Cycle:
    Red: I have the attributes for both Credit and Debit Line Entries that balance
Update step defn: Credit/Debit attrs that balance

BDD Cycle:
    Green: I have the attributes for both Credit and Debit Line Entries that balance