Added delete_all_users.sql to delete all volunteers from django and
bwf.
Added test_volunteer.sql to define all permutations of volunteers
for testing. So far, Second Captain on one boat, Second Captain on
on boat and Crew on another, Second Captain on two boats and Crew
on a third.
Added second_captain_skills.sql to do just that.
Added certified_crew.csv, crew.sql, crew_values.sh in order to
add certified crew to the database.
Bulk loading of volunteers.
Added complete list of Second Captain skills for all boats.
Added unique index to Skills (skill_short_name, role_id).
Added VolunteerSkillBoat for test user Second Captain on One Boat
to test_volunteer.sql
Added Second CaptainTwo and Crew One to test_volunteer.sql
Added Crew Two to test_volunteer.sql.
Minor cleanup and prettying.
Merge branch 'volunteers_for_testing' of https://github.com/billmania/BWF into david