notlisp: mk_env()

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
sexp: ability to invoke parser as object

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
notlisp: fix for evaluation of null expression

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
notlisp: more verbose eval

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
tut: ensure_throws_verify

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
notlisp: more tests

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>