GoalsNotSurveyDistributable

• Changes the survey distribution mapping to only add child accounts of the bank account.
• Changes the distributed survey for child ledger accounts to be their balance, since they cannot have their distributions changed.
• Removes budget items from the mapping survey when the item is already distributed.
• Changes the date for the reconciled account to use the opening balance transaction when present and the bank account is never reconciled or the first of the previous month.
• Adds the date the expected balance is calculated from to the mapping survey information.
• Adds a member function to the general ledger to locate the opening balance transaction.
• Adds using the calculated from date when the reconciled date is not available for a survey.
• Adds validation that the distributed balance is correct.
• Disables the distribution sliders for goal budget items in a survey.
• Changes the budget codes index to use only account numbers and not codes.
• Adds a Qt debug stream insertion operator for the account number.
• Adds a constructor to create a transaction only by a date.
• Adds a function that calculates the first of the month for a given date.
• Renames reconciled survey to CompletedSurvey.
• Renames bank account survey to mapping survey.

Closes #67 (closed)