EXP-203. Pass arguments to model phases

issue: https://jira.kiji.org/browse/EXP-203
review: https://review.kiji.org/r/1141
Changed LM convergence criteria

review: https://review.kiji.org/r/1146/
reviewed by: robertchu
EXP-205. Avro 1.7.5 jars are not in front of hadoop classpath on cluster

issue: https://jira.kiji.org/browse/EXP-205
review: https://review.kiji.org/r/1151