[tracker] (25 commits) ...Merge branch 'wip/carlosg/anonymous-nodes' into 'master'

[Carlos Garnacho <carlosg src gnome org>]

Summary of changes:

  93ab1d8... libtracker-data: Minor refactor (*)
  d5f86dd... libtracker-data: Drop unused argument in function (*)
  a77b2bd... libtracker-data: Drop unused argument from insert/delete ho (*)
  f2bb417... libtracker-data: Remove another argument from insert/delete (*)
  585cfd2... libtracker-data: Remove dead code (*)
  e1b230a... libtracker-data: Avoid pointless queries on predicate IDs (*)
  5cb0970... libtracker-data: Avoid querying unnecessary IDs for notific (*)
  10fb355... libtracker-data: Use TrackerProperty for predicate in track (*)
  1929769... libtracker-data: Pass GValue as object instead of GBytes (*)
  7942c4e... libtracker-data: Get resource URIs after failures (*)
  4abd90d... libtracker-data: Deal with resource IDs as int64 (*)
  5cebd1d... libtracker-data: Deal with triple subjects as int64 ROWIDs (*)
  1f9aff2... libtracker-data: Return int64 when creating new blank node (*)
  e35043f... libtracker-data: Add TrackerToken API to hold blank nodes (*)
  a2b6b6e... libtracker-data: Handle blank node tokens in TrackerSparql (*)
  5b3cc30... libtracker-data: Use bnode tokens where blank nodes are req (*)
  1c341a6... libtracker-data: Insert TrackerResource URN early before in (*)
  77dcc21... libtracker-data: Improve handling of boolean values (*)
  b0b9e2e... libtracker-data: Fix condition where blank_node_map is not  (*)
  1811ac6... libtracker-data: Refurbish version management (*)
  6cf3168... libtracker-data: Do not store pre-generated URN for blank n (*)
  3d39067... libtracker-data: Implement anonymous blank nodes (*)
  8075095... libtracker-sparql: Add enum value for anonymous bnodes (*)
  817a553... docs: Mention ANONYMOUS_BNODES flag in the docs (*)
  b284f86... Merge branch 'wip/carlosg/anonymous-nodes' into 'master'

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