add support for non-standard annotation information
add support for non-standard annotation information

macieksmuga/schemas,hjellinek/schemas,nlwashington/schemas,dglazer/schemas,Jeltje/ga4gh-schemas,laserson/schemas,saupchurch/schemas,heuermh/ga4gh-schemas,hjellinek/jeltje-schemas-sphinx,diekhans/ga4gh-schemas,sarahhunt/schemas,dnanexus-rnd/schemas,adamnovak/schemas,laserson/schemas,benedictpaten/schemas,diekhans/ga4gh-schemas,lh3/schemas,ga4gh/ga4gh-schemas,hjellinek/schemas,adamnovak/schemas,lh3/schemas,benedictpaten/schemas,ga4gh/schemas,sarahhunt/schemas,dcolligan/schemas,nlwashington/schemas,dnanexus-rnd/schemas,buske/schemas,pcingola/schemas,Jeltje/ga4gh-schemas,buske/schemas