Added support for 1024pt marketing app icons

1.2

Merge branch 'MarketingIcon'

Added a version flag

v1.12

Added version flag

Prevents duplicate property names in Swift

v1.11

Prevent duplicate property names in generated Swift code

Adds support for Xcode 9

1.1

Adds support for Xcode 9.0

Initial Release

• Creates .xcasset packages from a folder of images
• Generates Swiftcode for easily referencing image in a safe way