Added AUTHOR_DISPLAY_LENGTH in support of #117.
Added truncation by AUTHOR_DISPLAY_LENGTH in support of #117.
Simplified title logic to use title if present; if not, use alternate title. Fixes #111. Added join of all Author results - fixes #117.
Merge pull request #118 from gwu-libraries/t111_title

T111 - revisited title logic, added support for multiple authors