Default FG color=white and default BG color=black

Fix crash when there is an unknown file format inside palettes/ folder

Add common keys in ui::Entry for OS X

Fix crash when PixelsMovement() wants to create an extra cel without …

…enough memory

Fix scroll problem with EditorView when we drag-and-drop Tabs

Add --trim command line option

Fix regression: --help doesn't work on Windows

base::SystemConsole must be created before any std::cout/printf() is used

Mask color shouldn't make black color transparent in RGB and Grayscal…

…e images

Generate kKeyDownMessage for Cmd key correctly

Redraw transformation handles when the quick tool is changed