Delete requirements.txt

Merge pull request #119 from oberbichler/feature/compute-at-span

Compute at span

Merge pull request #118 from oberbichler/feature/mesh-mapper

Add MeshMapper

Merge pull request #116 from oberbichler/feature/projection

Feature projection

Update requirements.txt

Increase version number

Merge pull request #112 from oberbichler/feature/span-tools

Extend span functions

Increase version number

Increment version number

Increment version number