Added code for auto adding and upgrading of db changes.
Somewhat big change code-wise, but not so big feature wise.
-Added auto db creation
-Made bin/start shutdown files work with relative paths
-Cleaned up the mailer
-Moved common joptsimple to another file
-db scripts now are structured, should be easier to change the db in the future
-Organized the conf and bin for each type of server
-Added single server type package.
-Removed admin client, may re-add later.
Merge branch 'master' of github.com:azkaban/azkaban2 into autodb

Conflicts:
	src/sql/create_schedule_table.sql
	src/sql/update_2.0_to_2.1.sql
Adding update file for auto updating.
Merge branch 'master' of github.com:azkaban/azkaban2

Conflicts:
	src/sql/create_schedule_table.sql
	src/sql/update_2.0_to_2.1.sql
Merge branch 'autodb'
Deleting create_all script. These will now be auto generated.