Prefer stow over hand-rolled solution

After discovering GNU stow on Nix IRC, refactored install and setup
scripts to consume it.

Code is vastly simplified as a result.

configs/shared/ghci

@@ -1,13 +0,0 @@
--- Useful Typeclasses
-import Control.Applicative
-import Data.Monoid
-
--- Data Structures
-import qualified Data.Map.Internal as Map
-
--- Lenses
-import qualified Control.Lens           as Lens 
-import qualified Control.Lens.Traversal as Lens
-
--- Friendly prompt
-:set prompt "\ESC[34mλ> \ESC[m"

configs/shared/haskell/.ghci

@@ -0,0 +1,32 @@
+-- Useful Typeclasses
+import Control.Applicative
+import Data.Monoid
+
+-- Data Structures
+import qualified Data.Map.Internal as Map
+
+-- Lenses
+import           Control.Lens
+import qualified Control.Lens           as Lens 
+import qualified Control.Lens.Traversal as Lens
+
+-- Friendly prompt
+:set prompt "\ESC[34mλ> \ESC[m"
+
+-- GHCi on Acid
+:m - Prelude
+:m + GOA
+setLambdabotHome "/Users/wpcarro/Haskell/bin"
+:def bs        lambdabot "botsnack"
+:def pl        lambdabot "pl"
+:def unpl      lambdabot "unpl"
+:def redo      lambdabot "redo"
+:def undo      lambdabot "undo"
+:def index     lambdabot "index"
+:def docs      lambdabot "docs"
+:def instances lambdabot "instances"
+:def hoogle    lambdabot "hoogle"
+:def source    lambdabot "fptools"
+:def where     lambdabot "where"
+:def version   lambdabot "version"
+:def src       lambdabot "src"

configs/shared/zsh/.zshrc

@@ -3,6 +3,9 @@ export DOTFILES="${HOME}/dotfiles"
 export ZSH="${HOME}/.oh-my-zsh"
 export PATH="${PATH}:${HOME}/.local/bin"
 
+# Put this here temporarily until we have a better place for it.
+export FPP_EDITOR='emacsclient -n'
+
 ZSH_THEME=refined
 plugins=(zsh-autosuggestions git git-extras github)