add min_step_size
use OrderedDict. check if starting weights are in given weight_scores
decode and evaluate for single parameter setting
create a histogram from file
remove redundant white space from file
replace adhoc default logprob int -10000 with float -10000.0. Do not use empty strings when creating viterbi translation or nbest translations. In find_next_states: if target is empty, i.e. target_words == ('',), then lm_continuation_cost = word_penalty = 0.0 and new_history does not add the empty target string. In calc_future_cost: if target is empty, give logprob of 0.0.
fix histogram x-axis