Rough cut of Workers

Summary: workers do work, provided I have written them correctly. perhaps it
is so.

Test Plan:

Reviewers:

CC:

resources/sql/patches/005.workers.sql

@@ -0,0 +1,20 @@
+create database phabricator_worker;
+
+create table phabricator_worker.worker_task (
+  id int unsigned not null auto_increment primary key,
+  taskClass varchar(255) not null,
+  leaseOwner varchar(255),
+  leaseExpires int unsigned,
+  priority bigint unsigned not null,
+  failureCount int unsigned not null,
+  key(taskClass),
+  key(leaseOwner),
+  key(leaseExpires)
+);
+
+create table phabricator_worker.worker_taskdata (
+  id int unsigned not null auto_increment primary key,
+  taskID int unsigned not null,
+  data longblob not null,
+  unique key (taskID)
+);