symbol::value now takes a Ptr to LispObject directly, not using the stack anymore.
Numbers now also do not use the stack anymore.
Removed LCPP_pStack completely.
Defined macro LCPP_DeclareRawDataMember which takes care of declaring a raw char-array as raw data.
Environments now uses LCPP_DeclareRawDataMember for the Ptr<...> types and the hashtable.
Implemented env::get(Name|Parent).