ensured that JOSHUA environment variable is set, used in kenlm (removed dependence on readlink which is not cross-platform compatible)
ensured that JOSHUA environment variable is set, used in kenlm
(removed dependence on readlink which is not cross-platform compatible)

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