• Added PurchaseEntries and PurchaseEntryLines
• Fixed trailing slash
• Fixed double division numbers in URL
• Fixed bug with primary key

Thank you @it-can

New entities, more properties and a bugfix for filters.

Note: Using $entity->filter() was bugged when returning multiple results. This call now always returns a collection of items, which may have 0, 1 or multiple items. This way you can be sure of a consistent result (array).

Added support for more Account fields.
Added support for Contacts.
Added support for GLAccounts.
Added support for PaymentConditions.
Added support for SalesEntry's (sales bookings in the old system)
Thanks @sebastianberm

Added example code and updated readme

Added journals endpoint

PSR-4 update

Open sourced.