Massive configuration overhaul

Currently paying the price of months of non-diligent git usage.

Here's what has changed.

- Theming support in Gvcci and wpgtk
- Dropping support for i3
- Supporting EXWM
- Many Elisp modules
- Collapsed redundant directories in ./configs

configs/shared/x_server/.xsessionrc.shared

@@ -1,42 +0,0 @@
-#!/bin/sh
-
-source ~/.profile
-
-export DESKTOP_SESSION=cinnamon  # gnome for trusty.
-
-# NOTE: This may break your compose key.
-# See http://g/i3-users/YBexXGbik7E for more details.
-# NOTE: IM_MODULE is an "Input Method" module, which I believe affects the way
-# keyboard events are processed. `xim` is "X Input Method"; other options
-# include: `ibus`, `fcitx`, but I'm unsure what features each offers.
-export GTK_IM_MODULE=xim
-
-# Desktop background color.
-xsetroot -solid "#333333"
-
-# start tmux with a few commonly used sessions
-# TODO: consider moving this else like ~/.profile, so it doesn't depend on X.
-# This might be better for SSH.
-tmux new -d -s main
-
-# start `clipmenud`,
-# TODO: research if this would be better handled by init/clipmenud.service?
-clipmenud &
-
-# Start the Emacs server
-emacs --daemon
-
-# start compton for shadows, transparency, fading, etc.
-compton &
-
-# set kbds
-xmodmap -e 'remove Lock = Caps_Lock'
-xmodmap -e 'keysym Caps_Lock = Escape'
-
-# since we separated our i3 configurations between a shared and device-specific
-# setup, we need to make sure that when we start an X session, our i3
-# configuration is up-to-date.
-cat ~/.config/i3/config.{shared,device} >~/.config/i3/config
-
-# set key repeat preferences
-xset r rate 250 60