Added dev section in the main index
Added dev section in the main index

It doesn't hurt, and it makes the navigation working.

scala-ide/docs,sschaef/docs,ar-android/docs,ar-android/docs,sschaef/docs,scala-ide/docs,wpopielarski/docs,sschaef/docs,scala-ide/docs,ar-android/docs,wpopielarski/docs,ar-android/docs,wpopielarski/docs