[tracker] (6 commits) ...Merge branch 'wip/carlosg/rewrite-bus-impl' into 'master'

[Sam Thursfield <sthursfield src gnome org>]

Summary of changes:

  dad6b5f... libtracker-sparql: Declare direct connection constructors i (*)
  d3fec06... utils: Drop tracker-resdump noinst util (*)
  4254113... libtracker-sparql: Reply earlier to D-Bus query messages in (*)
  4098bbd... libtracker-sparql: Reimplement all bus connection objects (*)
  aea373b... build: Cleanse of Vala dependencies (*)
  1c94abe... Merge branch 'wip/carlosg/rewrite-bus-impl' into 'master'

(*) This commit already existed in another branch; no separate mail sent