1.2.8.1: New repository infrastructure and small spotify improvements

2017-08-20 18b0b54 actionless chore(gtk-theme): update submodule
2017-08-20 251b7a9 actionless chore(PKGBUILD): add `grep` and `sed` to the deps
2017-08-20 300c516 actionless chore(themes): add `xresources3`
2017-08-20 5e9fcc5 actionless chore: add .gitattributes
2017-08-19 6a34e25 actionless chore(gui): update built theme
2017-08-19 bb4fdc1 actionless chore: update gtk-theme submodule
2017-08-19 2c83918 actionless chore: remove more leftovers from gtk theme - 2
2017-08-19 7d8d5d4 actionless chore: remove more leftovers from gtk theme
2017-08-19 fe298ca actionless doc(readme): improve usage examples
2017-08-19 3cc62f0 actionless chore(pkgbuild): copy files explicitly
2017-08-19 6ed7fb7 actionless chore(pkgbuild): remove .git from gtk-theme
2017-08-19 da72fa1 actionless chore: update gtk-theme submodule
2017-08-19 f9c4c51 actionless chore: move gtk-theme into submodule
2017-08-08 70e6403 actionless feat(gui: theme_model; change_color): use selection BG as a fallback value for focused WM border
2017-08-08 ac54802 actionless chore(themes): set selected border color for some old themes
2017-08-08 c0a63aa actionless feat(spotify; themes: omega): simplify choosing main spotify colors