switch to scala 2.10.2

Change-Id: I5426cc206d8c6945a24e1980b1fe089edc236d35
fix cwd in build.sh

Change-Id: I778cc1a3765916fefe0fccd79eb3f433819a33ef
disable sbt-pgp plugin

Change-Id: Ie237113631114ecf9d6e2e6129868a0062cbbf7f
change class path order