Added Class BulkTransactionLine

[florowebdevelopment]

We thought of two solutions:

1. Overwrite the url property of the TransactionLine class, however its not only a 'bulk' prefix the url is also slightly different 'financialtransaction/TransactionLines' => 'bulk/Financial/TransactionLines'.
2. Create a new class BulkTransactionLine

Please note we did not add an Entity Test because the parent class is Picqer\Financials\Exact\TransactionLine instead of Picqer\Financials\Exact\Model.

[markjongkind]

The deprecated endpoint financialtransaction/Transactions has 26 properties, while the new bulk/Financial/TransactionLines endpoint has 68 properties. Also the Primary Key is different (EntryID vs ID). So I think option 2 (creating a new class) is the best solution, without using TransactionLine as the parent class.

Edit: nevermind.

[davidvandertuijn]

@markjongkind

without using TransactionLine as the parent class.

You compare Transactions with TransactionLines, while BulkTransactionLines is the same as TransactionLines, except for the url property.

https://start.exactonline.nl/docs/HlpRestAPIResourcesDetails.aspx?name=FinancialTransactionTransactionLines
https://start.exactonline.nl/docs/HlpRestAPIResourcesDetails.aspx?name=BulkFinancialTransactionLines

Because of the deprecated endpoint Transactions, i decided to use BulkTransactionLines instead of TransactionLines because of the increased Page Size of 1000 instead of 60.

I hope this Pull Request can go live before 01-04-2019.

[markjongkind]

Oh boy, my bad. I'm going to shut up now and let you talk. Nice work with this PR!

[Lauren076]

Waiting for this one to get approved...