Update with bibfilter: add a new bibtex template

Allow search for publication year, keyword,
Improve the search filters

example:
[bibfilter
file=bib.bib
group=year
group_order=desc
allow=inproceedings,article,book,inbook,incollection,techreport,mastersthesis,phdthesis,unpublished
author=Nguyen|Gimel'farb|Delmas
sortauthors=1
keyword="3D content,Web browsers,World Wide Web,Internet,Online front-ends,Stereo image,3D image,3D reconstruction,Image analysis,Vision,Binocular,Stereopsis,Calibration"
]
You should not use WP_PLUGIN_DIR (see http://codex.wordpress.org/Determining_Plugin_and_Content_Directories)