Add release materials check boxes to miniconf proposal

We need to have people who are submitting a miniconf proposal agree to
releasing the material. The easiest way to do this is to just make it a
proposal like the other two types. We don't have audience type for
miniconf, instead of deleting it just have a default - it's easier.

WARNING: This requires a real migration to be performed before use.

pinaxcon/proposals/forms.py

@@ -61,4 +61,6 @@ class MiniconfProposalForm(ProposalForm):
             "abstract",
             "private_abstract",
             "technical_requirements",
+            "recording_release",
+            "materials_release",
         ]

pinaxcon/proposals/migrations/0003_auto_20170702_2227.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.3 on 2017-07-02 12:27
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('proposals', '0002_auto_20170702_1140'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='miniconfproposal',
+            name='materials_release',
+            field=models.BooleanField(default=True, help_text="I allow Linux Australia to release any other material (such as slides) from presentations covered by this proposal, under the <a href='https://creativecommons.org/licenses/by-sa/3.0/au/deed.en'> Creative Commons Attribution-Share Alike Australia 3.0 Licence</a>"),
+        ),
+        migrations.AddField(
+            model_name='miniconfproposal',
+            name='recording_release',
+            field=models.BooleanField(default=True, help_text="I allow Linux Australia to release any recordings of presentations covered by this proposal, under the <a href='https://creativecommons.org/licenses/by-sa/3.0/au/deed.en'> Creative Commons Attribution-Share Alike Australia 3.0 Licence</a>"),
+        ),
+        migrations.AddField(
+            model_name='miniconfproposal',
+            name='target_audience',
+            field=models.IntegerField(choices=[(1, 'User'), (2, 'Business'), (3, 'Community'), (4, 'Developer')], default=4),
+        ),
+    ]

pinaxcon/proposals/models.py

@@ -52,7 +52,10 @@ class TutorialProposal(Proposal):
         verbose_name = "tutorial proposal"
 
 
-class MiniconfProposal(ProposalBase):
+class MiniconfProposal(Proposal):
+
+    target_audience = models.IntegerField(choices=Proposal.TARGET_AUIDENCES,
+                                          default=Proposal.TARGET_DEVELOPER)
 
     class Meta:
         verbose_name = "miniconf proposal"