added max_slivers (instance) quota attribute to slice model
diff --git a/planetstack/core/admin.py b/planetstack/core/admin.py
index ed34fff..07029a2 100644
--- a/planetstack/core/admin.py
+++ b/planetstack/core/admin.py
@@ -641,9 +641,9 @@
 
 class SliceAdmin(PlanetStackBaseAdmin):
     form = SliceForm
-    fieldList = ['name', 'site', 'serviceClass', 'enabled','description', 'service', 'slice_url']
+    fieldList = ['name', 'site', 'serviceClass', 'enabled','description', 'service', 'slice_url', 'max_slivers']
     fieldsets = [('Slice Details', {'fields': fieldList, 'classes':['suit-tab suit-tab-general']}),]
-    list_display = ('name', 'site','serviceClass', 'slice_url')
+    list_display = ('name', 'site','serviceClass', 'slice_url', 'max_slivers')
     inlines = [SlicePrivilegeInline,SliverInline, TagInline, ReservationInline,SliceNetworkInline]
 
     user_readonly_fields = fieldList
diff --git a/planetstack/core/models/slice.py b/planetstack/core/models/slice.py
index fd91c30..bd41f87 100644
--- a/planetstack/core/models/slice.py
+++ b/planetstack/core/models/slice.py
@@ -20,6 +20,7 @@
     description=models.TextField(blank=True,help_text="High level description of the slice and expected activities", max_length=1024)
     slice_url = models.URLField(blank=True, max_length=512)
     site = models.ForeignKey(Site, related_name='slices', help_text="The Site this Slice belongs to")
+    max_slivers = models.IntegerField(default=10) 
     imagePreference = models.CharField(default="Ubuntu 12.04 LTS", null=True, blank=True, max_length=256)
     service = models.ForeignKey(Service, related_name='service', null=True, blank=True)
     network = models.CharField(default="Private Only",null=True, blank=True, max_length=256)