Merge pull request SixLabors#665 from SixLabors/af/memory-bridge

Consume memory primitives from SixLabors.Core

Merge pull request SixLabors#596 from SixLabors/af/beta4

Update Shapes (.Text) and add tests for DrawText

Beta 3

Merge pull request SixLabors#382 from SixLabors/core2

Add new netstandard2.0 target and update dependencies.

Merge pull request SixLabors#299 from SixLabors/beta-1

Beta 1