Commits for galt

v330_preview to v330_preview2.1 (2016-03-07 to 2016-03-14) v330

• fix typo in hgBlat code comment
  
  • src/hg/hgBlat/hgBlat.c - lines changed 1, context: html, text, full: html, text
• Fixes #16982. nextItem was crashing for custom track big*
  
  • src/hg/hgTracks/hgTracks.c - lines changed 6, context: html, text, full: html, text
• Fixes #16975. hgc: we need to only use nonVirtPosition in certain more-specific conditions.
  
  • src/hg/hgc/hgc.c - lines changed 7, context: html, text, full: html, text