[galaxy-user] [patch] much more efficient fasta tools

Hi everyone, I got bored waiting around for the fasta tools to finish so I improved the length filter and fasta to tabular scripts. On a reasonable data set these were taking over ten minutes with the old version. With this version its a few seconds. The improvement comes from not reformatting the data, caching it in memory or building a hash. All of these are unnecessary for these tasks IMO. cheers, James