Allow buyer address to be not supplied in invoices

Author: p12tic

Diff for: shaibos/invoice.py

@@ -128,7 +128,7 @@ def from_dictionary(cls, dictionary):
             dictionary.get('correspondent_bank', None))
         return cls(
             name=dictionary['name'],
-            address=dictionary['address'],
+            address=dictionary.get('address', None),
             languages=dictionary['languages'],
             personal_number=dictionary.get('personal_number', None),
             company_code=dictionary.get('company_code', None),

Diff for: shaibos/templates/basic.jinja2

@@ -441,6 +441,7 @@
                             <strong>{{ i18n_string(buyer.name, language) }}</strong>
                     </td>
                 </tr>
+                {% if buyer.address %}
                 <tr>
                     <td>
                         <strong class="seller-right">{{ i18n_string(buyer.address, language) }}</strong>
@@ -450,6 +451,7 @@
                         {% endcall %}
                     </td>
                 </tr>
+                {% endif %}
                 {% if buyer.personal_number %}
                     <tr>
                         <td>