libgnt/libgnt

When someone uses our pc file they shouldn't need to explicitly add gobject to compile

Testing Done:
Ran configure and verified that `${builddir}/meson-private/gnt.pc` properly had `gobject-2.0` in `Required`

```
Requires: glib-2.0 >= 2.16.0, gobject-2.0
```

Reviewed at https://reviews.imfreedom.org/r/1478/
[general]
shadow = 0
[colors]
black = 0; 0; 0
red = 1000; 0; 0
green = 0; 1000; 0
blue = 250; 250; 700
white = 1000; 1000; 1000
gray = 700; 700; 700
darkgray = 256; 256; 256
[colorpairs]
normal = black; white
highlight = white; blue
highlightd = black; gray
shadow = black; darkgray
title = white; blue
titled = white; gray
text = white; blue
disabled = gray; white