Initial support for a list of bibtex files.
Change on indentation and fix typo.
kill innocent buffers after searching in `helm-bibtex-show-entry`.
Fix indentation.
ignore argument (buf) when `kill-buffer`.

By default it will kill the current buffer, which is exactly what we want.
Fixed docstrings.
Fixed two defcustoms.
helm-bibtex-bibliography: Allow file or list.

Mainly for backward-compatibility.
Merge branch 'multi-bibtex'

Allow multiple bibliographies, i.e. multiple BibTeX files.
Merge branch 'master' of https://github.com/tmalsburg/helm-bibtex