ABH Format needs to know who the parents are

[laceysanderson]

Currently the ABH export format assumes the first two samples are the parents. Obviously this is a horrible solution ;-P. The plan is that the administrator will be able to specify the parents when exposing the VCF file. If the ABH format doesn't make sense for that particular VCF (e.g. diversity panel) then parents won't be added and the interface should know not to show that export option.

[laceysanderson]

The dev plan for this feature is to create a vcf file prop table that can store any properties we may want.

• move the SNP count and XXX into properties and out of the main table
• add a germplasm count, parentA and parentB
• create form elements in admin interface for settings these properties
• load them in the load function
• don't show ABH format if parents are not set
• add germplasm count and parents to the tabular listing for vcf files