entangle: 0.5.2-1~getdeb2~raring

  * New upstream version
     * Split histogram into RGB colour channels
     * Fix aperture / shutter speed calculations in status bar
     * Only import files with known image extensions
     * Use case insensitive file extension check to detect raw files
     * Set saner defaults for processing raw files to fix Canon
       raw display
     * Set preferences before loading session to fix settings
       for initial image load
     * Apply orientation from EXIF images if image file has none
     * Remove left over debug prints
     * Add support for linear histogram display mode
     * Support 'h' key to toggle linear/log histogram mode
     * Ensure all events are emitted in main thread
     * Remove use of deprecated GDK thread APIs
     * Use GtkGrid instead of deprecated GtkTable
     * Ensure status bar is constant size when scaling image
     * Preserve scrollbar offsets when switching images
     * Make metadata extraction more robust wrt missing fields
     * Updated translations from transifex