feat(#21): wire up circle CI, fix booting via x11docker & optimize setup script

[meatwallace]

• added circle CI config & updated scripts that runs shellcheck -> deploys to staging -> builds & pushes to dockerhub -> deploys to prod (closes implement basic Circle CI config that builds our Dockerfile #21, push docker image to public registry #31)
• inlined the run-unique function into the awesome autorun script as our user's /bin isn't in the path at login (closes add configuration required for compatibility with x11docker setup #32)
• wired up maim for screenshotting in awesome config (closes update awesome config to use maim for screenshotting #4)
• updated yay configuration to use our custom pacman config file and app-fast for parallel downloads (closes track source of our packages in our Yayfile so we can leverage app-fast for non-AUR packages #19)
• updated meatbox scripts to use our custom pacman config file
• added reflector to meatbox scripts to optimize our arch repo's mirrorlist
• added arch user repos to our pacman config to avoid extraneous compilation
• added messer (facebook messenger CLI) and added aliases
• disabled zsh completion & correction options preventing using aliases as args
• unnested hidden directories into the repository root
• updated dependencies & reformatted some files

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