fix out of date prose on cases
typo
adding highlighting for parametric methods
parse binop-exprs in cases position
link to issue
Check for underscores in the wrong places by looking for unbound _

Replace many individual checks in well-formed.arr with a pair of checks in
check-unbound that notice when an unbound id is an underscore.

This loses a bit of the context that was reported in the well-formedness
messages, but has the benefit of catching underscores in new expressions and
annotations by default.
add back full_meth
intermediate state
changes to make compilation of methods work correctly
bootstrapped w/methods
Merge branch 'master' of github.com:brownplt/pyret-lang
modified arrays interface and docs
clean up tests and update annotation
Merge branch 'master' of github.com:brownplt/pyret-lang
bootstrapped with updated arrays
Merge branch 'master' of github.com:brownplt/pyret-lang
make checkArray report RawArray rather than Array
compile multiple arities of methods to avoid closure creation
allow running tests at different phases
better error message