Support for biblatex bibliographies

Biblatex has a slightly different command, and includes the extension. This change simply matches that and adds it to the list of files to search.

This minor change does NOT however support the other bibliography formats that biblatex supports, and definitely not biber's remote bibliographies.
jumpToPDF: honor keep_focus and focus toggle settings with keybinding
jumpToPDF: honor keep_focus and focus toggle settings with keybinding
Merge branch 'patch-1' of https://github.com/pbnjay/LaTeXTools
Documented basic biblatex support (Jeremy Jay)
Add '/opt/local/bin' path for OSX building (macports)
Add '/opt/local/bin' path for OSX building (macports)