update support libraries to 23.3. Update compileSdk to 23. Add legacy apache http support to build
update support libraries to 23.3. Update compileSdk to 23. Add legacy
apache http support to build

sagar15795/incubator-taverna-mobile,apache/incubator-taverna-mobile,ianwdunlop/incubator-taverna-mobile,larrytech7/incubator-taverna-mobile,sagar15795/incubator-taverna-mobile,apache/incubator-taverna-mobile