[tracker] (6 commits) ...Merge branch 'libtracker-extract'

[Martyn James Russell <mr src gnome org>]

Summary of changes:

  df7e969... libtracker-extract: Initial move of files into separate lib (*)
  10f17a1... libtracker-extract: Move tracker_get_extract_data to tracke (*)
  e40dd8d... libtracker-extract: Updated #ifdefs to avoid future conflic (*)
  a33598a... libtracker-extract: Added .pc file for 3rd parties to use w (*)
  92a1cee... libtracker-extract: Added documentation (*)
  b04279f... Merge branch 'libtracker-extract'

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