* Updating README.md files as well as man pages
This aligns with the latest changes in the official documentation. It also aligns dotnet test readme.md to official docs and introduces a new doc in the "Documentation" directory that deals with dotnet test protocols.
DOTNET_HOME is no longer required, though it is a documented override, so this change removes all unnecessary references to DOTNET_HOME from the CLI Repo.
Change the SYNOPSIS section. Add ENVIRONMENT section where needed.
Change the driver's man page to include all of the current commands.
The MD files now conform to the man pages outline. The manpages are updated as
well.
Fix#673
Convert the existing README.md from command directories into man pages. This
was done using pandoc. Some commands still don't have READMEs so they are not
present here.
Fix#3
