bibtex support

[jeisner]

Might you consider adding BibTeX support? Many people miscapitalize titles in their BibTeX entries. The title is supposed to look like the output of the titlecase module, which is why this person used the module.

However, substrings that have "inherent case" are supposed to be enclosed in protective {} to prevent individual BibTeX styles from changing their case. It seems easier to handle that within titlecase than by some kind of postprocessing.