Add support for long long int/BIGINT as a column type
Change groups table to used new long long int type for gid

It is now possible to do a proper order on gid, ie:
SELECT * FROM groups ORDER BY gid;
Change users table to used new long long int type for uid and gid

It is now possible to do a proper order on uid or gid, ie:
SELECT * FROM users ORDER BY uid;
Merge pull request #288 from vmauge/NewLongType

Add new long type and migrate some vtables