fix foldenrichment
the return of the xls/bed/tabular file, plus conversion in 0-based coordinates
Change URL to the original USCS mirror. UCSC binaries are not versioned, so we have a reproducibility problem and we are not allowed to store them on a different server.
fix for https://github.com/bgruening/galaxytools/issues/30, chaning the URLs back to UCSC mirror