Ignore tput errors

For example, tput is complaining that xterm-256color is an unknown terminal in MSYS2 when calling the man utility. However it seems to work correctly despite the error message. While this looks like a problem with MSYS2 rather than vimpager, let's not make output dirty with unnecessary errors.

By applying this patch and installing some implementation for `uudecode` (I'm using UUDeview for now), we can get a clean output for man in MSYS2, that is:

```
$ man bash
$
```

Instead of:

```
$ man bash
c:\msys2\mingw32\bin\tput: unknown terminal "xterm-256color"
c:\msys2\mingw32\bin\tput: unknown terminal "xterm-256color"
$
```