#21: Tables created

Sorted out the migratus stuff so that it actually works, and added a bit to README to say how to get the database initialised; added a new migration to add the roles and teams table.

resources/migrations/20170315190500-roles-and-teams.up.sql

@@ -0,0 +1,35 @@
+create table if not exists roles (
+  id serial primary key,
+  name varchar(64) not null
+);
+
+create unique index ix_roles_name on roles(name);
+
+create table if not exists rolememberships (
+  role_id integer not null references roles(id),
+  canvasser_id integer not null references canvassers(id)
+);
+
+create table if not exists teams (
+  id serial primary key,
+  name varchar(64) not null,
+  district_id integer not null references districts(id),
+  latitude real,
+  longitude real
+);
+
+create unique index ix_teams_name on teams(name);
+
+create table if not exists teammemberships (
+  team_id integer not null references teams(id),
+  canvasser_id integer not null references canvassers(id)
+);
+
+
+alter table roles owner to youyesyet;
+
+alter table rolememberships owner to youyesyet;
+
+alter table teams owner to youyesyet;
+
+alter table teammemberships owner to youyesyet;