Add two user management scripts

[coveralls]

Pull Request Test Coverage Report for Build 3967310544

• 0 of 120 (0.0%) changed or added relevant lines in 2 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-1.09%) to 64.746%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
daiquiri/core/management/commands/delete_users.py	0	41	0.0%
daiquiri/core/management/commands/find_users.py	0	79	0.0%
<!--	Total:	0	120	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
daiquiri/core/settings/django.py	1	91.67%
daiquiri/contact/views.py	2	93.75%
<!--	Total:	3		-->

Totals
Change from base Build 3845940112:	-1.09%
Covered Lines:	4608
Relevant Lines:	7117

---

💛 - Coveralls