Drop Julia v0.5

v0.4.0

Drop Julia 0.5 (#126)

v0.3.3: Merge pull request #104 from JuliaOpt/v7.5-tests

Fix tests for Gurobi v7.5

v0.3.2: Update grb_common.jl

Add ) that was dropped when conflicts were fixed via browser for #96

v0.3.1: Merge pull request #95 from odow/testsets

Change to testsets