Support PubMed IDs (PMID)

[Joeran]

It would be great if Docear4Word could match the BibTeX attribute pmid to the corresponding CSL variable. This is a request from a user and the request is probably relevant for many users, since PubMed is used by most researchers in the domain of biology and medicine:

PMID and PMCID are unique PubMed identifiers for all publications that are in its database.The NIH now requires that bibliography for all grant applications include these identifiers at the end (see example below).

This is how it should appear in the Word document:
Davis, G.M. A wavelet-based analysis of fractal image compression. IEEE Trans Image Process 1998;7(2):141–54. PMID: 18267389

The bibtex entry for this would look as follows:

@Article{Davis1998,
author = {Davis, G. M.},
title = {A wavelet-based analysis of fractal image compression},
journal = {IEEE Trans Image Process},
year = {1998},
volume = {7},
pages = {141-54},
number = {2},
pmid = {18267389},
timestamp = {2013.11.16}
}