dunno if these vimscript changes are good or not

.vim/ftplugin/vim.vim

@@ -4,6 +4,18 @@ set foldlevelstart=0
 " vim folds include explicit markers
 set foldmethod=marker
 
+" automatically open folds when entering them
+set foldopen=all
+
+" automatically close folds when leaving them
+set foldclose=all
+
 set shiftwidth=2
 
 set tabstop=2
+
+" in normal mode, leader x will source the whole file
+nnoremap <leader>x :source %<cr>
+
+" in visual mode, leader x will source the selected lines
+vnoremap <leader>x :<C-w>exe join(getline("'<","'>"),'<Bar>')<CR>

.vimrc

@@ -134,7 +134,7 @@ set mousehide
 let g:NERDTreeMouseMode = 2
 " ---------------------------------------------------------------------------}}}
 
-" Set Colorscheme -----------------------------------------------------------{{{
+" Colorscheme ---------------------------------------------------------------{{{
 if &t_Co > 2 || has("gui_running")
   " enable syntax highlighting
   syntax on