Added support for NestedScript vs non-nested scripts. This is to reduce the perf hit when executing scripts. This allows the API to be used in more traditional scenarios without the perf hit.
Adopting the Semantic Versioning scheme. Updated version numbers to reflect the first version that will be published.
Updated NuGet specs file
Removed TakeSnapshot method until actual support is added.
Merge branch 'master' of https://github.com/dotnetprofessional/xpf.Script.git