coodbms 0.10.2: operation access control

Operation access control is now in place, providing different sets of operations to different groups of users. Fully configurable and extensible, you can define new operations, operation sets and user groups. The initial configuration allows guests to create their own accounts and for admins to set the passwords for other accounts. Logins are controled by a single database and tokens are issued for subsequent access and for access to other databases on the same server.