materialized views from the spatial database. related to #52
create models for new spatial tables, fixes #70
add version numbers to packages in requirements.txt, fixes #72
upgrade drf version to 2.3.14 in requirements (security update)
Update school_details mv to have assembly and parliament ids. Fixes #74
Assembly and Parliament geo end points
first pass mockup of user models
add fields to users models based on clarifications
add 'status' to VolunteerDonorRequirement table to track status of donation
rename KLPUser to User
implement signup, signin and signout end-points, fixes #61, #62, #63