Small rename for clarity.

Updated to remove Cgd.

Require Swift 5.0.

Renamed cropped(rect:) to cropped(to:), and adjusted indent style.

Update Image.swift

Fixed case of tests directory.

Merge pull request #8 from markuswntr/master

Adds Data initializer and export.

Updated README with Swift 4 instructions.

Merge pull request #6 from enricode/enricode/new_interpolations

Choose image interpolation based on size change

The framework now imports as SwiftGD.