Started to setup for codebase validation tests.

Fleshed out initial version of AST::is_equal( AST* )

Setup the test directory with initial files for each major validation test.

test/Godot/Readme.md

@@ -0,0 +1,15 @@
+# Test : Godot full AST reconstruction and compile validation
+
+***Note: This validation test has not been implemented yet.***
+
+Repo : https://github.com/godotengine/godot
+
+* Download the Unreal source code
+* Find paths of every header and source file
+* Generate an ast for each file and serialize it to a file called `<name of file>.gen.<h/c>`
+* Reconstruct the ast from the generated file
+* Compare the original ast to the reconstructed ast
+* If all ASTs are considered valid, overwrite the original files with the generated files
+* Compile the engine.
+
+Currently the most involved test planned for the library.