Commits for max

v315_base to v316_preview (2015-04-20 to 2015-04-27) v316

• fixing hgMirror to handle tracks without a table, refs #15059
  
  • src/hg/hgMirror/hgMirror - lines changed 64, context: html, text, full: html, text
• adding indexes in hgMirror, refs 15059
  
  • src/hg/hgMirror/hgMirror - lines changed 8, context: html, text, full: html, text
• hgMirror bacends track fix, refs 15059
  
  • src/hg/hgMirror/hgMirror - lines changed 4, context: html, text, full: html, text