Add cairo_xlib import after conky upgrade

Fix nvidia-smi process name matching

Update README: remove outdated requirements

Use 6 digit hex colors for conky 1.18.3

Simplify container widgets' layout methods

Update README

Update docs

Rename Group to Rows to make its purpose more obvious

Allow non-filler widgets to be added to Columns with a zero width.

Allow widget to have no height without being considered a filler.

Fix calculation of line height in StaticText.

Fix wrong defaults being used for font weight and slant.

Update docs

Adjust personal layout

Replace outdated hddtemp with hwmon lookups