mod_managed improvements (#FS-5029)

Some improvements to mod_managed:
- Added GetPtr to Util class for internal pointers extraction (very useful when using native api)
- Added pure CreateStateHandlerDelegate in ManagedSession for native api usage
- Added "CONSOLE" log level support
- Added per module references directory support (PrivateBinDir)
- Added shadowing for all assemblies which loaded in module's app domain