Add imaliyethu.api skeleton.
Merge branch 'develop' into feature/issue-2-create-toilet-code-models
Merge branch 'develop' into feature/issue-2-create-toilet-code-models

Conflicts:
	imaliyethu/settings.py
Rename API to toilet codes.
Add model for toilet codes.
Add admin for toilet codes.
Re-implement ToiletCode.nearest using heapq.nlargest and add tests.
Merge branch 'feature/issue-2-create-toilet-code-models' into develop