Merge 'parser_fk_index' into 'trunk'

r8139@luke-mbp (orig r4482):  lukes | 2008-06-10 17:25:34 +0100
new branch for making the FK index optional
r8140@luke-mbp (orig r4483):  lukes | 2008-06-10 20:09:24 +0100
added some perldoc
r8141@luke-mbp (orig r4484):  lukes | 2008-06-10 20:40:42 +0100
allow add_fk_index param to be specified in rel def
r8142@luke-mbp (orig r4485):  lukes | 2008-06-10 21:07:56 +0100
fixed failing test