Unify syntax-type
Modify normalize
Remove unnecessary import
Modify cps-conversion
Modify util
Modify Env
Modify Primitives
Pass type check
Pass type checking
Pass compile
Implement load
Fix typo
Fix bug of primitive functions
Show env
Without cps-conversion
Fix bug of normalize
Add lib/syntax.scm
Add macro-expansion debug message
Move utility function
Fix bug of normalize