Merge pull request #260 from Zopieux/master

Added notr=true on placeholder texts in .ui files
Add link to Transifex in Help menu
Automatic merge of Transifex translations
* Fixed BasicHeader's resizeEvent.
* Style fixes to GoogleWrapper.
* Style results-box scrollbar.
Add /usr/local/lib/${CMAKE_LIBRARY_ARCHITECTURE} to FindLucene++.cmake libpaths
* Find sibling items within same parent node in PlaylistInterface.
* PlayableModel::currentIndexChanged signal now has two parameters: newIndex and oldIndex.
* Adapt pl-interface to new signal.
* Move along item selection with song change, if the previously playing track is the single selected item in a TrackView.
* Don't forget to update the current index.
Change label since other sources are likely the same version of the song just a different instance