Doesn't work yet.
Properly handle interesting identifiers under quote.
turn let_convert() from a method into a factory

only If and App need let-converting, so it makes no sense to have the
method everywhere

Also fix a bug in earley.rkt by always using that factory
remove debug print that made test_entry_point fail :(
Merge remote-tracking branch 'origin/streaming'
implement integer strategy for cells

fixes #11
Merge branch 'master' into reduce_prim_cont
this makes the trampoline actually work

(stupid typo)
restore struct comparison
Merge master branch into structs