color: add support for Windows consoles
Introduces color.mode configurable with values 'auto', 'ansi', or 'win32'. Any
other value disables coloring. When 'auto' is selected, the win32 console
method will be used if the win32console Python module is detected (requires
pywin32 to be installed).
clone: no race possible, we can use changegroup() and have smaller urls
Related to
issue2126