iOS ToDo

[mulshine]

• [x] Open/copy galleries to app from email/text/etc
• [x] Saving and loading gallery on device
• [x] File sharing via iTunes
• [x] Splash screen
• [x] Slider touch opens text field (should not)
• [x] Custom number keypad (juce provides some, but none with brackets...)
• [x] Icon size scaling (based on screen size)