Add 'allocated' status code to build

- This means that parts have been taken from stock

InvenTree/build/migrations/0011_auto_20190508_0748.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2 on 2019-05-07 21:48
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('build', '0010_auto_20190505_2233'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='build',
+            name='status',
+            field=models.PositiveIntegerField(choices=[(10, 'Pending'), (20, 'Allocated'), (30, 'Cancelled'), (40, 'Complete')], default=10, validators=[django.core.validators.MinValueValidator(0)]),
+        ),
+    ]

InvenTree/build/models.py

@@ -62,11 +62,13 @@ class Build(models.Model):
     
     # Build status codes
     PENDING = 10  # Build is pending / active
+    ALLOCATED = 20  # Parts have been removed from stock
     CANCELLED = 30  # Build was cancelled
     COMPLETE = 40  # Build is complete
 
     #: Build status codes
     BUILD_STATUS_CODES = {PENDING: _("Pending"),
+                          ALLOCATED: _("Allocated"),
                           CANCELLED: _("Cancelled"),
                           COMPLETE: _("Complete"),
                           }

InvenTree/templates/build_status.html

@@ -1,7 +1,7 @@
 {% if build.status == build.PENDING %}
 <span class='label label-info'>
-{% elif build.status == build.HOLDING %}
-<span class='label label-warning'>
+{% elif build.status == build.ALLOCATED %}
+<span class='label label-primary'>
 {% elif build.status == build.CANCELLED %}
 <span class='label label-danger'>
 {% elif build.status == build.COMPLETE %}