Merge pull request #75 from justgo129/master

corrected syntax errors in turtle for instrument_instance
fixed instrument instance list
more data in instrument instance show
fixed test
better image list pages
added "also known as" template to datasets

added "also known as" template to turtle for platforms

added "also known as" template to turtle for instruments

created other_identifiers.ttl.tut
"Also known as" for platforms, instruments, and datasets