Commits for braney

v322_preview to v322_preview2 (2015-08-31 to 2015-09-07) v322

• make hubPublicCheck put out empty string ("") for missing descriptionUrl
  instead of "(null)" #15932
  
  • src/hg/utils/hubPublicCheck/hubPublicCheck.c - lines changed 4, context: html, text, full: html, text
• Another pass at #6551. Put default visibilities in the cart at session
  save. On session load hide any tracks that are default visibile, but
  aren't mentioned in the cart.
  
  • src/hg/hgSession/hgSession.c - lines changed 55, context: html, text, full: html, text
  • src/hg/inc/cart.h - lines changed 7, context: html, text, full: html, text
  • src/hg/lib/cart.c - lines changed 37, context: html, text, full: html, text
• oops... bug fix for #6551 and existing sessions
  
  • src/hg/lib/cart.c - lines changed 1, context: html, text, full: html, text