fixes #153, adds option for inline attachments and filename filters

src/paperless_mail/migrations/0007_auto_20210106_0138.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.1.5 on 2021-01-06 01:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('paperless_mail', '0006_auto_20210101_2340'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='mailrule',
+            name='attachment_type',
+            field=models.PositiveIntegerField(choices=[(1, 'Only process attachments.'), (2, "Process all files, including 'inline' attachments.")], default=1, help_text="Inline attachments include embedded images, so it's best to combine this option with a filename filter.", verbose_name='attachment type'),
+        ),
+        migrations.AddField(
+            model_name='mailrule',
+            name='filter_attachment_filename',
+            field=models.CharField(blank=True, help_text='Only consume documents which entirely match this filename if specified. Wildcards such as *.pdf or *invoice* are allowed. Case insensitive.', max_length=256, null=True, verbose_name='filter attachment filename'),
+        ),
+    ]