Rewrite of property handling to be more robust and compliant

* No more _stash
* Now using a "virtual table" system via _objectClass
* Make Array.concat GoArray compatible (via .isArray())

Fix #16

Makefile

@@ -2,6 +2,19 @@
 .PHONY: underscore
 
 TEST := -v --run
+TEST := -v --run TestOperator$$
+TEST := -v .
+TEST := -v --run TestRegExp_global
+TEST := -v --run TestString
+TEST := -v --run TestArguments
+TEST := -v --run TestGlobal_skipEn
+TEST := -v .
+TEST := -v --run TestArray
+TEST := -v --run ForIn
+TEST := -v --run reflectStruct
+TEST := .
+TEST := -v --run reflectMap
+TEST := -v --run reflectArray
 TEST := .
 
 test: test-i