implement jax_vmap backend in ETermBase.make_function()
implement jax_vmap backend in ETermBase.make_function()

BubuLK/sfepy,sfepy/sfepy,BubuLK/sfepy,rc/sfepy,vlukes/sfepy,BubuLK/sfepy,rc/sfepy,sfepy/sfepy,vlukes/sfepy,vlukes/sfepy,rc/sfepy,sfepy/sfepy