tag for 1.7 release

update sqlite sample database to latest migrations

tag as RC for 1.7

Tagging Tracks 1.6 stable release

set the right version number for final release

git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@769 a4c988fc-2ded-0310-b66e-134b36920a42