How to modify the TFS 2013 default build process template (GitTemplate.12.xaml & TfvcTemplate.12.xaml) to enable releasing from a build

This post details how to modify the default TFS 2013 build process templates (GitTemplate.12.xaml & TfvcTemplate.12.xaml) to enable releasing from a build. It provides specific instructions for users with default templates (using ReleaseGitTemplate.12.xaml and ReleaseTfvcTemplate.12.xaml) and those with customized templates (using a provided snippets file). It also outlines considerations for using the Release Management build process template, including installing the client, setting 'Release Build' to TRUE, and specifying the 'Release Target Stage'.