Updated Readme and added missing headers

Change-Id: I1b2426ccccdd60aa10588b412cd470b3776b3442
build.sh Added clean options

Change-Id: I76339137845a4823d7b4442bf9263bfedc5e75f9
build.sh: check incorrect command line

Change-Id: I597b7ad924fc4256b2a281aabb8021f6aff35d46