Can't uncheck graphs after import

[glen.low@…]

In the Graphs list, when you have some files checked, perform an Import operation and then return to the Graphs list, some of the checked files cannot be unchecked.

[glenlow]

(In [192]) Updated version to 1.6.

iPad interface changes: popovers for settings: graph components, import/export and email; icons and startup images; separate preview, email and export buttons instead of single share button.

Upper left button in Graphs list is now named File (fix #113). All graph files are now unchecked after successful import (fix #112).

iPad implementation changes: root controller now handles pushing imported graph controller instead of import/export controller; initial graph render at viewDidAppear instead of viewDidLoad since scroller bounds not correct at viewDidLoad; color settings now redraw on color change; kCGColorSpaceGenericRGB is no longer available in iPhoneOS 3.2.

Configure script can now make universal binaries.

Fixed regressions since r191: graph now scrolls to selected component even if minor changes made; export and email to Quartz-based formats now correctly display text.

Minor cleanup: nil out delegates during object dealloc; now handles multiple viewDidLoad calls e.g. after view is unloaded and reloaded; fixed possible object leaks in color picker and drawing board trace layer.