Add salt module for rbenv
Add salt states for rbenv
Ensure the correct RBENV_ROOT is passed to rbenv.
Use MAKE=gmake for BSD OS.
Cleanup failed ruby installs
Use _rbenv_exec ret parameter for install_ruby
Use the rbenv uninstall --force option.
Cleanup some return values from rbenv module
Change _rbenv_exec with ret argument to return ret.
Add logging imports so we can debug.