Added queries/policies for managing events

Rakefile

@@ -29,6 +29,10 @@ task :policies do
     CLIENT.create_retention_policy('downsampled', db, '7d', 1)
   end
+  unless policy_names.include?('year')
+    CLIENT.create_retention_policy('year', db, '52w', 1)
+  end
+
   unless policy_names.include?('forever')
     CLIENT.create_retention_policy('forever', db, 'INF', 1)
   end

queries/events/builds_per_project_per_hour.txt

+CREATE CONTINUOUS QUERY builds_per_project_per_hour ON $DATABASE
+BEGIN
+    SELECT sum(count) AS "count"
+    INTO year.builds_per_project_per_hour
+    FROM "default".events
+    WHERE "event" = 'build_found'
+    GROUP BY time(1h), project
+END

queries/events/commits_pushed_to_master_per_hour.txt

+CREATE CONTINUOUS QUERY commits_pushed_to_master_per_hour ON $DATABASE
+BEGIN
+    SELECT sum(count) AS "count"
+    INTO year.commits_pushed_to_master_per_hour
+    FROM "default".events
+    WHERE "event" = 'push_commit'
+    AND "branch" = 'master'
+    GROUP BY time(1h)
+END

queries/events/commits_pushed_to_non_master_per_hour.txt

+CREATE CONTINUOUS QUERY commits_pushed_to_non_master_per_hour ON $DATABASE
+BEGIN
+    SELECT sum(count) AS "count"
+    INTO year.commits_pushed_to_non_master_per_hour
+    FROM "default".events
+    WHERE "event" = 'push_commit'
+    AND "branch" != 'master'
+    GROUP BY time(1h)
+END

queries/events/events_per_hour.txt

+CREATE CONTINUOUS QUERY events_per_hour ON $DATABASE
+BEGIN
+    SELECT sum(count) AS "count"
+    INTO year.events_per_hour
+    FROM "default".events
+    GROUP BY time(1h), "event"
+END