x86: add some more notes on typing in codegen
x86: add a basic tree-(type-analyzer)
x86: comment code and amend tests -- char-typed array indices work
x86: update typing comments in codegen again
x86: generalize and simplify pointer arithmetic handling
diagnostics: add non-fatal warnings
general: add findtok() -- DFS for a token in an tree
x86: properly deal with pointer subtractions, multiplications, etc.
x86: handle char * and casted (e.g. *(char *)p) dereferences
x86: add moar comments again again again 1!!11!
Forgot to git-add a crucial header...