Parsing ok !
Fixed bug.
Add type : symbol/real
Add string.
Concat ok
Added addition.
Addition using operator.
More complex exemples.
Support for define !!!
* Next steps : lambda !!!
Function definition is ok.
Fix bug : clean env after function call.
* Simplify code
* fixed bug on define
Clean code.
* Indent code (k&r)
* Now parse file
* added "-", "*" and "/" operations.
* Fixed big bug
* Simplified code
Clean code.
add makefile
Added support for progn.
progn exemple.