Start a developer manual for the project where we will keep policies,
guides and processes for the project in DEVELOPER-MANUAL.md.
Describe the policies for receiving and resolving github issues.
Describe the policy for git commit messages on pull requests and add git
notes for collaborating on a branch.
Describe the policy for commits from maintainers.
Describe how to set up a native windows powershell development
environment and some powershell tips.
Describe the requirements and steps for the current release process.
Replace the CONTRIBUTING section of the README.md with a link to this
manual.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>