nspectre 0.6.0 released

nspectre 0.6.0 has been released. Version 0.6.0 contains a number of improvements and new features. See the release notes for more detail.

IMPORTANT: This release contains a breaking change. Existing templates will need to be modified.
Instead of "outcome=" templates should use "return".

More information about nspectre can be found here: http://www.nspectre.org.uk/