 - Benchmarks for Bio::Grep POD to help ppl choosing the right backend.
 - filter priority (fast filters like FilterRemoveDuplicates should run first automatically)
 - queryfile for Hypa [ maybe we dump Hypa ]
 - interface for multiple queries
 - support other file formats (Genbank,...) and input sources (maybe even
   databases?)
 - support agreps regular expressions
 - support PoSSuM back-end
 - create a simple backend that does not require additional software [DONE]
 - make EMBOSS and bioperl-run optional
 - cleanup testcases
 - configfile for bgrep
 - Bio::Grep::Cookbook
