InstantAnswer.pm - change the structure of the updates column
InstantAnswer.pm - update commit_json to retrieve last value for each field using the new updates column structure
InstantAnswer.pm - modify remove_edit to remove all updates for a given field
InstantAnswer.pm - update commit_save
InstantAnswer.pm - remove debug messages and other tweaks
InstantAnswer.pm - solve merge conflicts
InstantAnswer.pm - updates column is now an hash
IA Pages - commit page - other_queries can be empty
Merge branch 'dev' into updates_column
Merge pull request #346 from duckduckgo/updates_column

InstantAnswer.pm - modify the structure of the updates column