v0.2.1

Fixes to includes in the library's public headers.

2020 feature update

Adds the following features and fixes:

• Polymorphic memory resource support
• Explicit deduction guides
• Basic slice operation
• Reshape and flatten operations
• Minor fixes to the documentation

v0.1.1: Changed Travis-script to be compatible with 2020.

Fixes the CI-scripts to be compatible with how Travis and AppVeyor work in 2020.

This release contains no code changes.

v0.1.0

Initial functional release.