adding hl7 schemas and schema validation of cat I export.  Modified cat1 result template to only render unti attribut if there is an actiual unit value not just an empty string.  updated template _2.16.840.1.113883.10.20.24.3.76.cat1.erb to deal with elements that were out of order
Merge branch 'develop' of github.com:projectcypress/health-data-standards into develop
Merge remote-tracking branch 'cy/develop' into develop