Added three new fields to tokens table, attribute_1, attribute_2 and mpid. The attribute fields are general purpose fields for storing/using additional information. The mpid field is a placeholder for later development of a "master_participants" table. The "master_participants" table would be able to join with the tokens table using this field. Changes should be backwards compatible with earlier tokens tables. Also some code tidying, and commenting out of line that replaces <CR><LF> line endings with just <LF> as this causes problems with qmail servers. Added export function as submitted by Pieterjan Heyse, modified for additional fields.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@855 b72ed6b6-b9f8-46b5-92b4-906544132732