Code cleanup
DisplayData stores DigitData as pointer, not vector anymore
Idem
Switched from buttons signals to listeners
Changed refresh delay to display memfree
DisplayData now instanciated at top-level and passed as pointer
Updated TODO
Code cleanup
Added PatternRandom
Pattern now manage a refresh delay
Changed background color to black
EffectFlashy uses PatternRaadom
EffectK2000 uses PatternVertical
EffectSettings does not change all leds anymore
Code cleanup
Removed EffectSimple
Added Link
Removed Link
Misc bugs fix