Working towards 1.9.1

tweak title

Updates for 1.9.0.RC4 - latest JDT

avoid <> for now until build changes made to jump to right java version

1.8.13 docs

temporarily remove test

testcode polish for 1.8.11

fix warnings in build - support .isJava8 option in build

Further 1.9 changes: better handling of source/target

ensure modules on path in build arg parser