* src/misc/variables.c, ALL: improvements to the object variables api. - added another argument to var_Change(). - added a VLC_VAR_SETTEXT and VLC_VAR_GETTEXT method to var_Change() that are used to set/get a friendly name to an object variable. - added VLC_VAR_CHOICESCOUNT to var_Change() to be able to retrieve the number of availabel choices without having to get their value as well. - VLC_VAR_ADDCHOICE uses the extra var_Change() argument to assign a friendly name to the choice value. - VLC_VAR_GETCHOICES retrieves the choices values and their friendly names. * modules/gui/wxwindows/*: first step in implementing menu auto-generation in the wxWindows interface.