Add alternative table structure digest for late 10.11 versions

[antontsv]

* 9b2ea61b30 digest [early 10.11] is for:
CREATE TABLE access ( service   TEXT  NOT NULL,   client    TEXT  NOT NULL,   client_type INTEGENOT NULL,   allowed   INTEGER NOT NULL,   prompt_count  INTEGER NOT NULL,   csreq   BLOB,   policy_id INTEGER,  PRIMARY KEY (service, client, client_type), FOREIGN KEY (policy_id) REFERENCES policies(id) ON DELETE CASCADE ON UPDATE CASCADE)

* 1072dc0e4b digest [late 10.11, early 10.12] is for:
CREATE TABLE "access" ( service   TEXT  NOT NULL,   client    TEXT  NOT NULL,   client_type INTEGENOT NULL,   allowed   INTEGER NOT NULL,   prompt_count  INTEGER NOT NULL,   csreq   BLOB,   policy_id INTEGER,  PRIMARY KEY (service, client, client_type), FOREIGN KEY (policy_id) REFERENCES policies(id) ON DELETE CASCADE ON UPDATE CASCADE)

[antontsv]

Addresses issue #21

[jacobsalmela]

Thanks man!