Added download addon link when running in Moedict-Desktop

Signed-off-by: Rack Lin <racklin@gmail.com>
打開 STANDALONE 及將阿美語標為 default
加上方敏英字典授權說明
Merge branch 'amis-react' of github.com:audreyt/moedict-webkit into amis-react
Merge branch 'master' into amis-react