Added shell of Reference class.
Merge branch 'master' into reference-class
Merge branch 'master' into reference-class
Now expect text on items; publish refs in blocks
Add test headings
Fix integration test failures
Merge branch 'master' into reference-class
Merge branch 'master' into reference-class
Refactor argument order to match command calls
Prototype `os.walk` caching and added `pyficache`
Fix renamed attribute
Fix failing tests
Revert removal of item/document cache settings
Add setting to disable cache
Pylint and test cleanup
Merge pull request #7 from jacebrowning/reference-class

Implement external reference lookup and caching.