Cached security questions.
Removed eager retrieval of profile, for more efficient SQL.
Removed unused model attributes.
Changed so the full profile is only re-read from the DB if the last
modified time has changed.
Organized imports.
Removed unused 'sponsors' list (saves a database call).
Made clients for 'import research activities' cacheable.
Removed unused 'sponsors' from test.
Merge pull request #183 from ORCID/dev-variousPerformanceImprovements

Dev various performance improvements