madlib/madlib — pull request #208 by aojwang (2012-08-21 06:30:52+00:00)
Title: insert the information of the columns in which all the values are null.

JIRA: MADLIB-635
During encoding process, if all the values of a column is null, then we will remove the column from breakup table in 'ignore' mode. Therefore, besides insert the columns' information in the breakup table to the metatable, we need to insert those columns in which all the values are null to the meta table. This PR is used to track the issue.

When i fix this bug, I found that we didn't change the file Module.yml. As now we invoke some functions from array_ops, we need to depend on that module. As it's a minor problem, i combine to this PR. Thanks.