move resources.py to MarkdownLivePreview.py

Having an extra file is just a pain because you have to save it manually
for ST to reload, and it was small and created way more trouble than it
needed to... It fits really nicely in there anyway

And add some nice CSS

live-testing/test.md

@@ -1,12 +1,15 @@
 # hello world  
 
-This is a *test*. asdfas
+This is a *test*. Some inline `[2]code()`.
 
-```
+```python
 import this
 # you should try this
 ```
 
 <!-- some comment -->
 
-this flickering is really annoying...
+this flickering is really annoying...
+
+
+It looks like it's gone... Oh wait nah, it's still here...