tracker-preferences: Added reindex function, require GTK+3 & fix optical disc sensitivity.

- Glade file required older GTK+ 2.x version, but we require 3.x in the code
  base.

- The index optical discs checkbutton was not correctly insensitive at the
  right times.

- We now have a "system" page to reindex our data if users want an easy way to
  do this.
Updated Polish translation
Updated Galician translations
Updated Czech translation
Updated Hebrew translation.
Fix typos in tracker-search man page

A few of the short options were misspelt.

https://bugzilla.gnome.org/show_bug.cgi?id=703097
Updated Brazilian Portuguese translation
Updated Traditional Chinese translation(Hong Kong and Taiwan)
Removed markup from UI files
Updated Spanish translation
Updated Norwegian bokmål translation
Updated Czech translation
Updated Lithuanian translation
libtracker-common: Use procfs psinfo instead of cmdline on Solaris
libtracker-common: Use space if the artist name is not known

This is to follow the following spec:
https://wiki.gnome.org/MediaArtStorageSpec#Identifiers

Space will be the fallback if the artist name is unknown.

Fixes GB#705834
vapi: Removed src/vapi/ which was required for very old versions of gio-2.0.vapi

build: depend on Vala 0.16.0 as a minimum to cater for this change so we don't
carry around an old version of the GIO bindings...

https://bugzilla.gnome.org/show_bug.cgi?id=706003
Merge branch 'remove-old-gio-vapi'
build: Update required libgsf version to 1.14.24

Needed for gsf_doc_meta_data_read_from_msole()
libtracker-data: Switched all GValueArray --> GArray

GValueArray is deprecated
Updated Slovenian translation