Merge branch 'global'

Conflicts:
	.gitignore
	effects.c
	gdigi.c
	gdigi.h
	gdigi_xml.h
	gui.c
	gui.h
	preset.c
	preset_xml.c

effects.c: More effect_values_0_to_* arrays for various effects.
           VALUE_TYPE_POSID for linkable effects.
           Add the rest of the global settings (need to change USB_POSITION
           to GLOBAL_POSITION throughout).
           A few label typos.
           New settings, groups, and effects for linkables.
           Make the display three rows instead of two.
           Add missing modifiers.
           Add missing xml settings.
           Code for handling/updating the global modifier linkable list.

effects.h Add VALUE_TYPE_POSID.

gdigi.c   Tweaks for value formatting.
          Use NOTIFY_MODIFIER_GROUP_CHANGED to drive the update of the combo
          boxes for linkable effects.
          Use RECEIVE_MODIFIER_LINKABLE_LIST to handle the update of the
          combo boxes for linkable effects.

gdigi.h   Minor changes.

gui.c     Deprecate gtk_vbox_new().
          Use simpler API gtk_combo_box_text_append_text().
          Minor reformatting/whitespace changes.
          Code to update combo boxes for linkable effects.
          Code to retrieve global parameters from device at startup.

preset_xml.c
          Some tweaks to map_xml_value() so that it's passed resolved
          EffectValues for settings of type EXTRA.

gdigi.h

@@ -976,10 +976,10 @@ enum {
   EFFECTS_LIB_CUSTOM = 1856
 };
 
-#define GLOBAL_POSITION 0
+#define USB_POSITION 0
+#define GLOBAL_POSITION 0 
 
 #define TUNING_REFERENCE 12288
-
 #define USB_AUDIO_PLAYBACK_MIX 12297
 #define USB_AUDIO_LEVEL 12307