add aggregator_item table to structure-tables

add masquerade and mollom to structure-tables

improve documentation for example-dgb.drushrc.php

use the same list of structure-tables found in the example file as default

improve list of suggested structure-tables in example drushrc file

fix skip table issue occuring when specifying both structure-tables and skip-tables

update README.txt with up to date info about drushrc.php (fixes ISSUE-8)

fix array merge to use array_merge() instead of union operator which was causing unreliable behavior

Merge pull request #7 from mimlee/unknown_options

Remove -- before message options to avoid drush Unknown Options error.

add flood table to common list of structure-tables

add post processing changes functionality to allow for fine grained dump changes via regex

update example-dgb.drushrc.php to have same default list as dgb.drush.inc (search_node_links was missing)

remove version number for Drush in README

add search_node_links table to common structure-tables