Parse call statements

TODO

@@ -1,15 +1,17 @@
 # Intermediate code generation
 
-- Put symbol table in the reader monad and it to the stack
-  or use the state monad for everything.
-- Add errors handling to the monad stack.
+- Traverse the AST and generate IR.
 
 # ELF generation
 
 - Don't ignore relocations where the symbol is not defined in the symbol table.
   Report an error about an undefined symbol.
-- Don't hardcode symbols in symbolEntry.
 
 # Name analysis
 
 - Format error messages.
+- Return non-zero error code on errors.
+
+# Built-in
+
+Printi should be able to print numbers with multiple digits.