Added support for 'N' when creating genomic alterations.
Added support for 'N' when creating genomic alterations.

GreggHelt2/apollo-test,GreggHelt2/apollo-test,GreggHelt2/apollo-test,GreggHelt2/apollo-test,GreggHelt2/apollo-test,GreggHelt2/apollo-test,GreggHelt2/apollo-test