improved WOWser code editing

I got annoyed with lack of IDE-style indenting in the online editor so I fixed it.

https://bartvds.github.io/dogescript/   (use tab /shift-tab, see https://jakiestfu.github.io/Behave.js/)

added behave.js for better text editing
- indenting (tab/ shift-tab)
- handy stuff with braces, tabs etc

tuned textarea size css & js
- disabled manual resize
- locked width at 49.9%
- added javascript to keep maximum height

switch classes to ID's