in the generated DOI use downcase filetype rather than camelcase
OPSK-85 - synchronise ontology task depends on tmp:create

fails if the tmp directory is missing when run in production
OPSK-86 removed the sunspot config from git and added as a default

to avoid changing a file in git when configuring the server

a default now exists that needs to be copied. the sunspot.yml will be included in .gitignore
OPSK-86 updated install doc and ignore sunspot.yml