RM hints set strand to "."

[swarbred]

Currently strand for repeat hints is taken from the user input GFF, it is probably safer to just set this as "." i.e. replace + - so this has no strand orientation. As repeatmasker sets a strand in it's table output file a user can end up generating a gff with strand set to + or - for the repeat features.

For augustus I dont believe we want to retain this, but rather just set all repeat features to strand "."