* Don't look for bibliography in ~/.pandoc. Reason: doing
this requires a read + parse of the bibliography even when
the document doesn't use citations. This is a big performance
drag on regular pandoc invocations.
* Only look for default.csl if the document contains references.
Reason: avoids the need to read and parse csl file when the
document contains no references anyway.
* Removed findFirstFile from Shared.
John MacFarlane
3eef887dfa