Minor update to include static binaries

This is version 0.42.1 of Kallisto. We recommend that users upgrade to this version.

Updates include

• index
  • now accepts multiple FASTA files and creates an index of all the targets
  • transcripts that end with polyA, runs of length 10 or greater have the polyA tail clipped
• quant
  • now accepts multiple FASTQ paired end files, or single-end files
  • --single flag to specify single-end reads
  • simplified jumping rules
  • uses soft-intersect, if one read has no mapping k-mers the other end is used for pseudoalignment