Schema: add table icingadb_schema

[Al2Klimov]

fixes #59

[lippserd]

CREATE TABLE icingadb_schema (
  id int(10) unsigned NOT NULL AUTO_INCREMENT,
  version varchar(255) NULL DEFAULT NULL,
  timestamp bigint(20) unsigned NOT NULL,
  PRIMARY KEY(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;

INSERT INTO icingadb_schema (version, timestamp)
  VALUES ('v1.0.0-rc1', CURRENT_TIMESTAMP() * 1000);

[lippserd]

CREATE TABLE icingadb_schema (
  id int(10) unsigned NOT NULL AUTO_INCREMENT,
  version smallint(5) unsigned NOT NULL,
  timestamp bigint(20) unsigned NOT NULL,
  PRIMARY KEY(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;

INSERT INTO icingadb_schema (version, timestamp)
  VALUES (1, CURRENT_TIMESTAMP() * 1000);

[lippserd]

See above 😆

[lippserd]

Thanks!