v0.5.4

Add support to manage project features (#17)

Changing the artifact storage for a project is done through project
features, add support to the TeamCity client used by our Terraform
provider to allow managing project features

This was based on existing code to manage build features

TEST=manual

Testing was done in conjunction with changes done with the Terraform
provider, applied a pipeline to a local TeamCity where a TeamCity
project was made with some random project feature