6.6.2

Features

assert_null and assert_not_null
added simulate to the test object so you no longer have to use gut when calling it. It is fine if you still do though. Sorry if this breaks something.
Doubling, Stubbing, and Spies are no longer considered experimental.
The double method is now smart:
- It knows when you pass it a scene or a script, no need for double_scene anymore but it remains.
- You can pass it a loaded class or scene like this:
```
var MyClass = load('res://my_class.gd')
var MyClassDouble = double(MyClass)
```
You can now double Inner Classes by passing an Inner Class path like so:
```
double('res://my_script.gd', 'Inner1/InnerInInner1/AndSoOn')
```
The start of an internal Gut logger to make better messages down the road.
Experimental Full doubling allows you to Spy on most Built-in methods. You still cannot Stub them though. This must be enabled, details in the Double Wiki page.
Added link to Rainware's setup tutorial on youtube to the README

Issue 94 Gut runs after_all on inner classes that are skipped.
Rawsyntax fixed a bunch of misspellings so that we can erock on with less bad speligs fo wrds.