ITS9849 Update website to support LTS and Feature releases

html/.wmlrc

html/index.wml

html/software/download/index.wml

html/software/release/announce.wml

html/software/release/announce_lts.wml

html/software/release/changes.wml

html/software/release/changes_lts.wml

html/software/release/copyright.wml

html/software/release/copyright_lts.wml

html/software/release/index.wml

html/software/release/install.wml

html/software/release/install_lts.wml

html/software/release/license.wml

html/software/release/license_lts.wml

html/software/release/readme.wml

html/software/release/readme_lts.wml