Refactor classes in 'Command' design pattern

* Add new base class `Receiver`
* Add class `Shopkonfigurator`
* Create dedicated class modules, preventing circular imports
* Adjust wiring of module `database` to new specs
* Improve method `match_payments` in classes `Paypal` & `Volksbank`
* Reinstate `contacts` & `ranking` methods
* Remove regex config options
* Move regex to class `Invoice`
* Fix method `invoice2number` & invoice regex

README.md

@@ -33,17 +33,6 @@ verbose = off  # Enable verbose mode
 data_dir = ~/.local/share/knv-cli  # database directory
 import_dir = ./imports             # files to be processed & imported to database
 export_dir = ./dist                # generated spreadsheets & graphs
-
-# Regexes for import files
-[regexes]
-# (1) .. exported by PayPal™
-payment_regex = Download*.CSV
-# (2) .. exported by Volksbank
-volksbank_regex = Umsaetze_*_*.csv
-# (3) .. exported by Shopkonfigurator
-order_regex = Orders_*.csv
-info_regex = OrdersInfo_*.csv
-invoice_regex = *_Invoices_TimeFrom*_TimeTo*.pdf
 ```
 
 As you can see, many config options refer to the directory from which `knvcli` is being called.

knv_cli/__init__.py

@@ -1,21 +1,29 @@
+from .gateways.payments import Payments
 from .gateways.paypal import Paypal
 from .gateways.volksbank import Volksbank
-from .knv.shopkonfigurator import Orders, Infos
+
+from .knv.infos import Infos
 from .knv.invoices import Invoices
-from .utils import dedupe, group_data
+from .knv.orders import Orders
+from .knv.shopkonfigurator import Shopkonfigurator
+
+from .utils import build_path, dedupe, group_data
 
 
 __all__ = [
     # KNV data sources
+    'Shopkonfigurator',
     'Orders',
     'Infos',
     'Invoices',
 
     # Payment gateways
+    'Payments',
     'Paypal',
     'Volksbank',
 
     # Utilities
+    'build_path',
     'dedupe',
     'group_data'
 ]