System gets deleted if last dynamic interface and no static intrs exist
If last interface is static and it is being deleted sytem is also deleted
When deleting an interface in either the detail view, or the list view, the appropriate confirmation message is given
Deleting a system now deletes its interfaces as well, a confirmation is sent warning the user of this
I don't know how to grammar
Fixed dirtysoa tests
Fixed Cname tests
Fixed domain auto_delete tests
Fixed generic errors being returned in cydns forms
Vlan's now display their number in dropdowns
Merge pull request #399 from church29/Vlan_Number

Vlan's now display their number in dropdowns.
strip/lstrip/rstrip don't work like I thought

`"foobar".rstrip("rab")` returns "foo".
Friendlier exception

Testing using timeit.timeit shows no increase in execution time.
Merge pull request #402 from drkitty/has_perm-fixes

has_perm fixes
Don't suppress further handling function searching
Merge pull request #405 from drkitty/has_perm-hotfix

has_perm hotfix
Merge pull request #396 from church29/Domain_Errors

Fixed generic errors being returned in cydns forms
Fixed a grammer error
modify api tests to use django TestCase
Merge pull request #347 from church29/system_delete

System delete
All tests passed
Full Functional