Commits for larrym

v246_preview to v246_preview2 (2011-01-11 to 2011-01-18) v246

• fix problems with zoomed-out microarray tracks (redmine 2447); also include some experimental floating item code (currently dead code)
  • src/hg/js/hgTracks.js - lines changed 43, context: html, text, full: html, text
• set canPack to TRUE for wikiTracks (redmine 2395)
  • src/hg/hgTrackUi/hgTrackUi.c - lines changed 3, context: html, text, full: html, text