Commits for braney

v312_base to v313_preview (2015-02-16 to 2015-02-23) v313

• fix a bug in UDC cache when strings between slashes in a URL are longer
  than 255 characters so they can't be made into a directory. In this
  case we know make a SHA1 hash of the long string and use that instead.
  
  • src/lib/udc.c - lines changed 45, context: html, text, full: html, text
• let tracks with "itemRgb on" also use codon coloring if the user selects
  it (at least with bigGenePred tracks)
  
  • src/hg/hgTracks/simpleTracks.c - lines changed 1, context: html, text, full: html, text