2.2:

  * New: Allow for the value of other entries to be in the 'sed' command of a
	 filter. (May break existing configurations in cases where sed command
	 uses a '%'.)

2.1.5:

  * Fixed: Properly escape entries with a '%'


2.1.4:

  * New: Allow for comma separated list of references in aux_cmd.


2.1.3:

  * Fixed: entries that contain a '%' do not cause a failure.

  * New: access 'bibtex' entry in sqlite databases


2.1.2:

  * Fixed: 'extra' entries would override database entries if they shared the
           same token