Add direnv to vim plugins

.gitmodules

@@ -40,3 +40,6 @@
 [submodule "vim/.vim/bundle/vinegar"]
 	path = vim/.vim/bundle/vinegar
 	url = https://github.com/tpope/vim-vinegar
+[submodule "vim/.vim/bundle/direnv"]
+	path = vim/.vim/bundle/direnv
+	url = https://github.com/direnv/direnv.vim.git

bash/.bashrc

@@ -55,3 +55,7 @@ fi
 if [ -f "$HOME/.private_functions" ] && [ -r "$HOME/.private_functions" ]; then
   . "$HOME/.private_functions"
 fi
+
+if $(which direnv &> /dev/null); then
+  eval "$(direnv hook bash)"
+fi