Avoid using reflected types in the scripting API

since it causes numerous classloading issues. Using the wrapping types
and reload them in the proper context when needed.
Note: this version supports only classes, but the wrapping type could
be extended to support other types in the future.
+ numerous fixes related to proper loading and handling of the templates.

libraries/examples/scripting/jvm-simple-script/host/src/org/jetbrains/kotlin/script/examples/jvm/simple/host/host.kt

@@ -25,7 +25,10 @@ val myJvmConfigParams = jvmJavaHomeParams + with(ScriptCompileConfigurationPrope
 fun evalFile(scriptFile: File): ResultWithDiagnostics<EvaluationResult> {
     val scriptCompiler = JvmScriptCompiler(KJVMCompilerImpl(), DummyCompiledJvmScriptCache())
     val scriptDefinition = ScriptDefinitionFromAnnotatedBaseClass(
-        ScriptingEnvironment(ScriptingEnvironmentProperties.baseClass to MyScript::class)
+        ScriptingEnvironment(
+            ScriptingEnvironmentProperties.baseClass<MyScript>(),
+            ScriptingEnvironmentProperties.getScriptingClass(JvmGetScriptingClass())
+        )
     )
 
     val host = JvmBasicScriptingHost(