Added Apache License 2.0. Should add preambles and NOTICES sometime later.
Added Apache License 2.0. Should add preambles and NOTICES sometime later.

coflow/varys,frankfzw/varys,HKUST-SING/varys,HKUST-SING/varys,coflow/aalo,coflow/aalo,williamcityu/varys,coflow/varys,williamcityu/varys,frankfzw/varys,mosharaf/varys,mosharaf/varys