set :head to :initial false in cc0, as well as :comp :initial true.
add (sentence-impl), which coerces maps to a printable form - e.g. turns {:infl :top} into {:infl :present}.
fix definition of (successful?): don't use test constructs like test/is; just return a boolean.
add lexfn as a :use, so we can use (lexfn/unify)
comment (about optimization of sem-impl) and whitespace
make verbs require a nominative subject (not just {:not :acc}) to prevent disjuctive subjects (e.g. 

"lui (him)" in "di lui (than him)") 

from being subjects.
make "a (to)" {:italian {:initial true}}.
add tinylex for testing
add it1 (same as it but no type coercion of singleton lists to their only member)