v0.9: add filter for company data, update install code, add plugin icon

git-svn-id: https://plugins.svn.wordpress.org/intercom-for-wordpress/trunk@998853 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minor readme.txt modification

git-svn-id: https://plugins.svn.wordpress.org/intercom-for-wordpress/trunk@998854 b8457f37-d9ea-0310-8a92-e5e31aec5664