Fixed: Problem with hidden form element DisqusAPI Setting in admin form when libraries module is installed.
Removed config variables disqus_weight and disqus_nodetypes. Replaced disqus_location with disqus_blocks. Changed admin form and help page accordingly.
Injected module handler for DisqusSettingsForm object
Merge pull request #11 from angrycodr/Review-variables-and-admin-form

Review variables and admin form