new logo for Lubuntu

Lubuntu changed from LXDE to LXQt with the current release (Lubuntu 18.10), and changed their logo accordingly.

get_memory: fix awk for vm_stat on macOS

OS: Add Reborn OS

get_song: stop iTunesHelper from being detected

Modifiable info separator

OS: Add Namib GNU/Linux

Add support for puyo & spm

Update config comment with kitty backend.

Improve Hackintosh detection

Updated to fix new kitty bug prior to kitty fixes

Kitty recently updated and broke just using "kitty icat <image>" however, "kitty +kitten icat <image>" still works as intended.

This commit makes the neofetch script use +kitten.

- get_wm: Fixes non-EWMH WM detection on OpenBSD by introducing a
  ps_flags array the same way we do for disks. Tested successfully on
  Debian GNU/Linux (this change impacts all OSes).

- get_wm: Adds fvwm support

- get_model: Adds vmm(4) (OpenBSD's KVM counterpart) support

- get_disk: On OpenBSD you can't use df against a /dev/... unless being
root or in the 'operator' group. A separate disks array creation using
awk has been introduced only for this OS.

In case user has a custom-installed binary, prioritise it first before
using system-supplied binaries.