pigjar-44 Phase 4 Code Tidy.  Facile __str__ functions removed
pigjar-44 Phase 4 Code Tidy.  Call invariants via assert.
pigjar-44 Phase 4 Code Tidy.  Rename mock_open to prevent shadowing.
pigjar-44 Phase 4 Code Tidy.  Privatisation of history attributes (abandoned).
pigjar-44 Phase 4 Code Tidy.  Documentation updates.
pigjar-44 Phase 4 Code Tidy.  Test for single split record added.
pigjar-44 Phase 4 Code Tidy.  Autospec added to mocks.
pigjar-44 Phase 4 Code Tidy. Copyright boilerplate corrected.
pigjar-44 Phase 4 Code Tidy. Inspection.
pigjar-44 Phase 4 Code Tidy. Inspection.
Merge pull request #54 from trin5tensa/pigjar-44

Pigjar 44