Added static dir
Merge branch 'master' of github.com:paepcke/echo_tree_experiment
Merge branch 'master' of github.com:paepcke/echo_tree_experiment
Added beginnings of trigram capability to echo_tree_eval.py. Still need to complete. Also: for now changed all the sentence tokens to lower case. This means the reference score for the first unit test must be redone.