Add: shitty homework4.hs, need to do more thinking
Add: tons of bullshit
Add: more shit
Add: Block scopes and Func Scopes (for implement)
Add: most of checkStmtType
Add: check function application
Add: shit
Add: maybe??? completed
Edit: checking return statement should use checkReturnType
Edit: fixed most compile errors

iwannadie
Edit: passed compile, FUCKYEAH
Edit: rearranged file
Edit: scopeAddTo
Edit: function application was not done; fixed

https://www.youtube.com/watch?v=9ooqgBi6j_k
Merge branch 'master' into hw4-semantic-check
change importing and add phantom file
add auxiliary grammar file
fix id_list, init_id_list link
change to *nix style new-line
move several files