Started HGNC linkset script

Using Andra's commands from https://openphacts2011.atlassian.net/browse/IMS-302
Put commands into function
Corrected output to be turtle. Added link to VoID header
Started creating HGNC VoID using template file
Constructed HGNC dataset description
Added reference to Id.org pages for HGNC
HGNC Linkset and description
Added hgnc linkset description