Fix leap config path for windows

In the systray we are using:

ConfigPath = os.Getenv("APPDATA") + "\\leap"

That ends up being c:\Documents and Settings\<user>\Appdata\Roaming\leap

In bitmask-dev:

        from win32com.shell import shell, shellcon
        get_path = lambda name: shell.SHGetFolderPath(
            0, getattr(shellcon, name), None, 0).encode('utf8')
        path = get_path('CSIDL_LOCAL_APPDATA')

That ends up being c:\Documents and Settings\<user>\Appdata\Local\leap

We should use the same path for both.