--eval from examples just gives out EVAL, not the value

[barracuda156]

@Z-Shang Could you take a look?

macmini:LoLi-Lang-LoLi-9306a53 svacchanda$ /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_loli/loli/work/LoLi-Lang-LoLi-9306a53/src/LoLi2/currentg --version
LoLi Interpreter: version Dev alpha 2

macmini:LoLi-Lang-LoLi-9306a53 svacchanda$ /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_loli/loli/work/LoLi-Lang-LoLi-9306a53/src/LoLi2/currentg  --eval "(def foo (x) (.\ (y) (+ y x))) (def bar (foo 2)) (bar  3)"
EVAL

macmini:LoLi-Lang-LoLi-9306a53 svacchanda$ /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_loli/loli/work/LoLi-Lang-LoLi-9306a53/src/LoLi2/currentg --eval "(+ 1 2)"
EVAL

There are two concerns with the build process:

1. ulong is not defined anywhere; I had to add typedef unsigned long ulong;.
2. There are numerous warnings about unused parameter env:

/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_lang_loli/loli/work/compwrap/cc/opt/local/bin/gcc-mp-12 -arch ppc -std=gnu++11 -Wall -Og -Wextra -g -o currentg loli_obj.cpp loli_stack.cpp loli_reader.cpp loli_parser.cpp loli_util.cpp loli_env.cpp loli_eval.cpp loli_apply.cpp loli_repl.cpp loli_typeclass.cpp loli_main.cpp -lstdc++
In file included from loli_obj.cpp:23:
include/loli_obj.h: In member function 'virtual loliObj* loliObj::eval(loliObj*)':
include/loli_obj.h:70:40: warning: unused parameter 'env' [-Wunused-parameter]
   70 |         virtual loliObj* eval(loliObj* env){
      |                               ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliNum::eval(loliObj*)':
include/loli_obj.h:101:32: warning: unused parameter 'env' [-Wunused-parameter]
  101 |         loliObj* eval(loliObj* env) override {
      |                       ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliInt::eval(loliObj*)':
include/loli_obj.h:126:32: warning: unused parameter 'env' [-Wunused-parameter]
  126 |         loliObj* eval(loliObj* env){
      |                       ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliFlt::eval(loliObj*)':
include/loli_obj.h:159:32: warning: unused parameter 'env' [-Wunused-parameter]
  159 |         loliObj* eval(loliObj* env){
      |                       ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliKey::eval(loliObj*)':
include/loli_obj.h:224:32: warning: unused parameter 'env' [-Wunused-parameter]
  224 |         loliObj* eval(loliObj* env) override {
      |                       ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliFunction::eval(loliObj*)':
include/loli_obj.h:305:32: warning: unused parameter 'env' [-Wunused-parameter]
  305 |         loliObj* eval(loliObj* env){
      |                       ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliChar::eval(loliObj*)':
include/loli_obj.h:373:32: warning: unused parameter 'env' [-Wunused-parameter]
  373 |         loliObj* eval(loliObj* env){
      |                       ~~~~~~~~~^~~
include/loli_obj.h: In member function 'virtual loliObj* loliString::eval(loliObj*)':
include/loli_obj.h:400:32: warning: unused parameter 'env' [-Wunused-parameter]
  400 |         loliObj* eval(loliObj* env){
      |                       ~~~~~~~~~^~~