FC-2770: Integrate Font Awesome; remove old icons

git-svn-id: https://farcry.jira.com/svn/FC/trunk@12925 8f7d33b6-1012-0410-9a5a-bb7ecce9c363
tweak tinymce line height and heading sizes

git-svn-id: https://farcry.jira.com/svn/FC/trunk@12926 8f7d33b6-1012-0410-9a5a-bb7ecce9c363