work around the fact you can't show/hide buttons in a toolbar on ios w/ titanium. So this manages the toolbar for portrait/landscape mode of the detail window in a split view.

gistfile1.js

//So, grab the toolbar items.
//Its set up for portrait by default
var tbButtons = $.toolbar.items
    , showMasterViewButton = tbButtons[0] //cache a copy
    ;

//For first run if launched in landscape mode
if(Ti.Gesture.isLandscape()) {
    tbButtons.shift();
    $.toolbar.items = tbButtons;
}

Ti.Gesture.addEventListener('orientationchange', function(e) {
    if(Ti.Gesture.isLandscape()) {
        Ti.API.warn('orientationchange ---> landscape');
        tbButtons.shift();
    } else {
        Ti.API.warn('orientationchange ---> portrait');
        tbButtons.unshift(showMasterViewButton);
    }
    $.toolbar.items = tbButtons;
});