audacious: remove titlebar and update shade buttons

update README

refine colors and tweak audacious theme

setup audacious theme

Merge branch 'tabs'

tweak light gray color

gtk: fix menu select colors (weren't up to date with personal setup for whatever reason)

add screenshot

fix install script

various updates

fix selected text color

add qt5 colorscheme

tweak panel/frame

flatten and remove padding from 'frame' elements

invert image assets and increase scrollbar/scalebar thickness

add steppenwolf-dark

fix left/right tabs

fix typo in 270-rotated tabs bg image for gtk2

modernize tabs

modernize tabs