added joshua-decoder symlink to root dir for backwards compatability (until 5.0)
added joshua-decoder symlink to root dir for backwards compatability (until 5.0)

thammegowda/incubator-joshua,fhieber/incubator-joshua,gwenniger/joshua,kpu/joshua,gwenniger/joshua,lukeorland/joshua,lukeorland/joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,lukeorland/joshua,kpu/joshua,gwenniger/joshua,lukeorland/joshua,thammegowda/incubator-joshua,thammegowda/incubator-joshua,thammegowda/incubator-joshua,kpu/joshua,kpu/joshua,gwenniger/joshua,thammegowda/incubator-joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,fhieber/incubator-joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,thammegowda/incubator-joshua,fhieber/incubator-joshua,fhieber/incubator-joshua,fhieber/incubator-joshua,lukeorland/joshua,kpu/joshua,gwenniger/joshua,lukeorland/joshua,thammegowda/incubator-joshua,lukeorland/joshua,fhieber/incubator-joshua,lukeorland/joshua,lukeorland/joshua,gwenniger/joshua,kpu/joshua