Remove use of deprecated API.
Add abstraction layer for 3.0 compatibility.
Fix layout compatibility for Joomla 3.0
Disable the submit button while sending the comment to prevent duplicate posts.
More compatibility changes for Joomla 3.0
Fixed inconsistency between default config values.
Restore submit button original state also on failure.
Some layout changes in the summary install table.
Release 1.6.0