v.0.18.0 release

[egil]

Types of Changes

Prerequisites

Please make sure you can check the following two boxes:

• [ ] I have read the CONTRIBUTING document
• [ ] My code follows the code style of this project

Contribution Type

What types of changes does your code introduce? Put an x in all the boxes that apply:

• [ ] Bug fix (non-breaking change which fixes an issue, please reference the issue id)
• [ ] New feature (non-breaking change which adds functionality, make sure to open an associated issue first)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] My change requires a change to the documentation
• [ ] I have updated the documentation accordingly
• [ ] I have added tests to cover my changes
• [ ] All new and existing tests passed

Description

[Place a meaningful description here.]