Add basic collase to code-blocks

userscript.js

jQuery(document).ready(function(){
	/*
	Needs refinement
	
	* at the moment, even oneliners get height 10px and will be smaller
	  after being clicked
	* there is no clue for users that clicking will expand/collapse code sections
	
	*/
	jQuery('pre').css({height:'10em'}).toggle(
   		function(){jQuery(this).css({height:'auto'})},
		function(){jQuery(this).css({height:'10em'})}
	)
})