New function tidy_bib_file() removes duplicate and unneeded entries from a Bib(La)Tex-file.
Added encoding option to functions that read Bib(La)TeX-files and a corresponding global option. Option is also used to read parent documents in insert_citation() (reported by @sammo3182 #11)
Error message in insert_citation() are printed to the dialog instead of the console (reported by @sammo3182 #11)

citr 0.2.0

Zotero/Juris-M library can now be accessed directly via the Better Bib(La)TeX extension (https://github.com/retorquere/zotero-better-bibtex). The document's bibliography file is updated accordingly. See ?insert_citation.
bibliography entries are no longer checked for missing fields (suggested by @awmercer, #8)
If the current document is a child (i.e., included in a larger R Markdown document) the parent file is searched for bibliography paths (suggested and contributed to by @yihui, #7, #10)
References in addin selection and inserted markdown citations are ordered alphabetically

citr 0.1.0

Initial release.